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Author Topic: [ANN] (QTUM) - A Scalable Smart Contract Platform w/ Proof of Stake  (Read 429618 times)
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May 15, 2019, 04:36:05 AM
 #6321

this time hodl please. i hate to see this coin going up with much effort then falling down to beginning every time.  Grin

QTUM ATH was 103 usd. When the next bull market reaches it's peak between 2021 and 2022 the qtum chart will challenge it's ATH again and if it breaks it we can see a new ATH so my bets are on at least seeing Qtum trading again for $100. I would not worry much unless there is a huge black swan event.

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May 15, 2019, 08:38:38 PM
 #6322

Huge profits to be had at this price
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May 15, 2019, 10:47:34 PM
 #6323

this time hodl please. i hate to see this coin going up with much effort then falling down to beginning every time.  Grin

QTUM ATH was 103 usd. When the next bull market reaches it's peak between 2021 and 2022 the qtum chart will challenge it's ATH again and if it breaks it we can see a new ATH so my bets are on at least seeing Qtum trading again for $100. I would not worry much unless there is a huge black swan event.

I have the same hopes for QTUM it was a big gainer during the last bull run and it honestly change my life when i sold at $80. Now is the time of accumulation and everyone shouldn't FOMO later on. We have the opportunity to buy now and we should take it. I already filled my bags and ready for the next bull run event.

anks
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May 16, 2019, 02:30:17 AM
 #6324

i also have big hopes for qtum as a investment its great to see the price gains in the last few days

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May 16, 2019, 10:28:30 AM
 #6325



Development Updates (May 05 -13)






Qtum Core

Qtum core updates normally consist of Qtum Improvement Protocols. These QIPs are generated by both our developers and the community and in some cases requests from enterprise users. Our developers evaluate the impact of each QIP and work on high priority QIPs. All bug fixes and feature enhancements that have been issued to the core project will be listed here.


  •      Testing QIP-5,6,7,9;
  •      Release a configurable alert mechanism for the main network
  •      Version v0.17.5 release
  •      Fixed a bug introduced in 0.17.4 that caused some nodes not to be able to properly reorg when receiving a duplicate stake block
  •      Added a recent checkpoint
  •      Fixed gitian script filename in gitian build docs
  •      Configuring Qtum to run on a rasp Zero W (which has an armv6 CPU)



Qtum x86 Virtual Machine

The Qtum X86 Virtual Machine is a smart contract operating software that is designed to enable easily deployable decentralized applications. Currently you can write smart contracts in C, there will be additional languages as we proceed with x86 development.

   


Enterprise version -- Unita


The enterprise version of Qtum, featuring high TPS (Transactions Per Second) and short confirmation time for blocks. QtumX also features easy end user customization per specific business chain requirements.


    1, Mobile adaptation
    2, Research the Cluster deployment scheme base on Kubernetes.



Qtum Explorer & Wallets

The Qtum Explorer is our blockchain explorer that is used for viewing transaction details on the Qtum blockchain. The primary blockchain explorer site is qtum.info. We frequently release updates to both explorer and the web wallet sites. Additionally, you’ll find information regarding the official Qtum electrum wallet and support/feature updates to hardware wallets or other interesting services/products


PC Wallet

  •     Finished the Prototype design and the PRD of the new PC wallet



Qtum website

  •     Worked on official forum
  •     Added an email forwarding system of forum



Qtum Testing

  •     Update travis config to skip unstable test cases temporarily








Qtum Telegram Channel: https://t.me/qtumofficial
Qtum Twitter: https://twitter.com/QtumOfficial
Qtum Facebook: https://www.facebook.com/QtumOfficial
Qtum Reddit: https://www.reddit.com/r/Qtum


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●▬●▬●▬● First UTXO Based PoS Smart Contract and DAPP Platform ●▬●▬●▬●
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May 19, 2019, 06:16:55 AM
 #6326

Qtum is token or coin ?

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May 19, 2019, 06:43:41 AM
 #6327

Qtum is token or coin ?


The Qtum native token (or coin) exists on our own blockchain. They were sold during our March 2017 crowdsale as a way to pay for the resources required to execute Smart Contracts. This is the shortest way to answer your question, but the long form answer involves a look into the Qtum primer documents:

https://qtum.org/en/community/resources

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May 20, 2019, 12:22:14 PM
 #6328

Use Qtum on Crypto.com’s Wallet & VISA Card














We’ve set many goals for ourselves at Qtum. We’re building a better blockchain, we’re helping enterprises reach new heights of security, and we’re making smart contracts simpler and more efficient than they’ve ever been. We’re proud of the progress we’ve made developing a stronger, faster, and more robust blockchain. We believe that blockchain and cryptocurrency will soon become accepted, even ubiquitous, in daily life, and so we’re thrilled to announce that Crypto.com has added QTUM to its pioneering Wallet & Card app for Android and iOS.


What does this mean for QTUM holders? It means that the bridge between fiat and Qtum has been built, and it’s ready to use. It means that you can use Qtum, at its real cost, to buy a trip around the world and enjoy every stop along the way!


The Wallet portion of Crypto.com’s app secures several denominations of cryptocurrency and fiat and allows the in-app purchase of cryptocurrency. Other wallets offer similar functionality, but Crypto.com’s Wallet has an incredible accompaniment: the MCO Visa Card, which allows purchases from over 40 million merchants worldwide. Together, the Wallet and Card bring crypto off of the exchanges and onto Main Street.


“ We’re delighted to welcome QTUM community to the Crypto.com platform. Today, you can buy & sell QTUM at true cost with bank transfer and credit card purchase both supported. We are committed to expanding QTUM coin in other Crypto.com products and allowing QTUM HODLers globally to maximize its utility,” said Kris Marszalek, Co-Founder, and CEO of Crypto.com."


Crypto.com integration of Qtum also represents validation for our team, our product, and our vision. After all, the solution works with only the best cryptocurrencies. Other supported currencies include bitcoin, ether, TrueUSD, and Litecoin; we’re honored to join this exclusive club.

There’s still a way to go before we achieve mass adoption of cryptocurrency, but here at Qtum, we believe this is a great stride in the right direction. We continue to reach our goals, make our visions real, and bring our dreams to life; thank you for your help and support along the path.


“We are excited to see the community expanding use cases for Qtum, and we couldn’t be more thrilled that a reputable company like Crypto.com is taking charge,” said Patrick Dai, co-founder of Qtum.


Download the Crypto.com Wallet and order the Card: You’ll be glad you did. Who knows? Perhaps we’ll run into you somewhere in this amazing world.


Apple iTunes: https://itunes.apple.com/us/app/crypto-com-wallet-card-app/id1262148500

Google Play: https://play.google.com/store/apps/details?id=co.mona.android






Qtum Telegram Channel: https://t.me/qtumofficial





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May 21, 2019, 04:37:14 PM
 #6329

this time hodl please. i hate to see this coin going up with much effort then falling down to beginning every time.  Grin

Its just riding BTC prices, we are yet to see the real price of QTUM in this price rally.

Once BTC starting to show some stable price, QTUM will be one of the biggest coin that will greatly benefit in this coming bull run.
Yes for rising btc price maximum altcoin's price has been increased to base on fiat but base on btc maximum altcoin price is down. We have to wait for rising price on btc too.

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May 22, 2019, 03:00:52 PM
 #6330

this time hodl please. i hate to see this coin going up with much effort then falling down to beginning every time.  Grin

Its just riding BTC prices, we are yet to see the real price of QTUM in this price rally.

Once BTC starting to show some stable price, QTUM will be one of the biggest coin that will greatly benefit in this coming bull run.
Yes for rising btc price maximum altcoin's price has been increased to base on fiat but base on btc maximum altcoin price is down. We have to wait for rising price on btc too.

It will happen in due time, If you believe in the project then filling your bags is the best thing to do now. Not a financial advise but seeing how other altcoins perform in the last bull run, QTUM has the most organic price growth in the past.

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May 22, 2019, 03:18:37 PM
 #6331

Qtum (QTUM) Now Supported by Trust Wallet Application



Qtum Wallet is available for users in the form of desktop, mobile, web or hardware wallet. Its mobile app is compatible with both Android and iOS while the desktop variant runs smoothly on Linux, Mac as well as Windows 32 and 64 machines.









There is always something new and exciting happening for the community of digital currency enthusiasts. In one such development, Trust Wallet Application has recently announced to add support for Qtum (QTUM) wallet. This update was shared with the users of Trust crypto wallet through the microblogging site Twitter on 13th May 2019.







Patrick Dai, the Founder of Qtum, made an official announcement as well to confirm their latest integration with Trust Wallet.







For all those who’ve just entered the crypto space, Qtum is a decentralized, public and open source blockchain application based on the consensus mechanism of proof-of-stake (PoS). While it combines the flexibility and convenience of the smart contracts, it also optimally utilizes the simplicity and security advantages found in the Bitcoin UTXO protocol. With Qtum, it is possible to run smart contracts on more than one virtual machines such as the EVM and x86 VM.

Qtum Wallet is available for users in the form of desktop, mobile, web or hardware wallet. Its mobile app is compatible with both Android and iOS while the desktop variant runs smoothly on Linux, Mac as well as Windows 32 and 64 machines.

Trust Wallet App, on the other hand, is a secure multi-cryptocurrency wallet that supports all the prominent cryptos and its protocols including ETH, POA, GO, ETC, VET, and many more. It lets users to hassle-freely send, receive, store as well as exchange their cryptos while enjoying complete control over their funds.

Trust Wallet only stores the private keys of the users locally and never accesses its users’ personal information which ultimately ensures that users get maximum data privacy and security. Additionally, the wallet is compatible with ERC223 and ERC20 tokens on the network of Ethereum. As it works seamlessly on the Binance DEX, users can carry out faster trading on the popular exchange.

Prior to this, the Trust Wallet App also declared its decision to integrate with WalletConnect on 11th May 2019.





great news, binance have the biggest volume

Hope Binance can make the QTUM great and QTUM is a good and promising coin that is worthy of being a long-term investment.

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May 24, 2019, 03:50:13 AM
 #6332

Qtum Development Updates (May 14 - 19)








Qtum Core


Qtum core updates normally consist of Qtum Improvement Protocols. These QIPs are generated by both our developers and the community and in some cases requests from enterprise users. Our developers evaluate the impact of each QIP and work on high priority QIPs. All bug fixes and feature enhancements that have been issued to the core project will be listed here.

  •    Testing QIP-5,6,7,9;
  •    Finish the code review of QIP-5,6,7,9;
  •    Merging bitcoin core 0.18 to qtumcore 0.18;
  •    Also merge 0.18 to HF branch;
  •    Continue working on header spam fix:
  •        Add header span filter in ProcessNetBlock;
  •        Increase the max header size;
  •        Fix for header spam test;


Qtum x86 Virtual Machine

The Qtum X86 Virtual Machine is a smart contract operating software that is designed to enable easily deployable decentralized applications. Currently you can write smart contracts in C, there will be additional languages as we proceed with x86 development.




Enterprise version -- Unita

The enterprise version of Qtum, featuring high TPS (Transactions Per Second) and short confirmation time for blocks. QtumX also features easy end user customization per specific business chain requirements.

  •    Mobile adapatation;
  •    Working on launch Unita to AWS and Google Cloud;


  •     Deploying SaaS on GCP;
  •        Homepage
  •        Explorer
  •        Faucet
  •        One-click Blockchain
  •        Unita Document



Qtum Explorer & Wallets


The Qtum Explorer is our blockchain explorer that is used for viewing transaction details on the Qtum blockchain. The primary blockchain explorer site is qtum.info. We frequently release updates to both explorer and the web wallet sites. Additionally, you’ll find information regarding the official Qtum electrum wallet and support/feature updates to hardware wallets or other interesting services/products.


PC Wallet

    
  • Finish the Prototype design and the PRD of the new PC wallet



Electrum Wallet

  •    Reduce qtum electrum GUI freeze the first time synchronizing.
  •    Fix block header synchronization failure in some case.
  •    Follow updates of Bitcoin electrumx.




IOS Wallet

  •    Test qtum-ios-v2 and fix some display issue.



Web Wallet


  •    Switch backend API to qtum.info;



Qtum website


  •    Work on official forum.
  •    Making a daily report tools for full nodes.



Qtum Testing

  •    Deploy testing network for hard fork




Document Updating


Finished instruction of building Qtum on rasp Zero W (which has an armv6 CPU) https://github.com/qtumproject/documents/blob/master/en/How-to-Build-Qtum-on-Raspbian.md










Qtum Telegram: https://t.me/qtumofficial




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May 25, 2019, 07:53:06 AM
 #6333

this time hodl please. i hate to see this coin going up with much effort then falling down to beginning every time.  Grin

Its just riding BTC prices, we are yet to see the real price of QTUM in this price rally.

Once BTC starting to show some stable price, QTUM will be one of the biggest coin that will greatly benefit in this coming bull run.
Yes for rising btc price maximum altcoin's price has been increased to base on fiat but base on btc maximum altcoin price is down. We have to wait for rising price on btc too.

It will happen in due time, If you believe in the project then filling your bags is the best thing to do now. Not a financial advise but seeing how other altcoins perform in the last bull run, QTUM has the most organic price growth in the past.
Yes you are on the same point of those who area great trader, it is a time to collect more and more qtum coin to make profit actually it i a time of qtum collection.

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CORNEL
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May 25, 2019, 08:36:34 AM
 #6334

this time hodl please. i hate to see this coin going up with much effort then falling down to beginning every time.  Grin

Its just riding BTC prices, we are yet to see the real price of QTUM in this price rally.

Once BTC starting to show some stable price, QTUM will be one of the biggest coin that will greatly benefit in this coming bull run.
Yes for rising btc price maximum altcoin's price has been increased to base on fiat but base on btc maximum altcoin price is down. We have to wait for rising price on btc too.

It will happen in due time, If you believe in the project then filling your bags is the best thing to do now. Not a financial advise but seeing how other altcoins perform in the last bull run, QTUM has the most organic price growth in the past.
Yes you are on the same point of those who area great trader, it is a time to collect more and more qtum coin to make profit actually it i a time of qtum collection.

Agreed with you this the time where it is very close to head towards the moon. I also think if anybody can afford to take risk on this dark horse than because it is sitting on very cheap price and it won't stay there for long time.


OOOBTC.com




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May 25, 2019, 05:43:41 PM
 #6335

QTUM will go to more 100$ in 2020 maximum 2021. i sure that will go to more 300$


this time hodl please. i hate to see this coin going up with much effort then falling down to beginning every time.  Grin

QTUM ATH was 103 usd. When the next bull market reaches it's peak between 2021 and 2022 the qtum chart will challenge it's ATH again and if it breaks it we can see a new ATH so my bets are on at least seeing Qtum trading again for $100. I would not worry much unless there is a huge black swan event.
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May 27, 2019, 10:45:23 PM
 #6336

Qtum Staking Guide: When Block Reward?





Jackson Belove
May 23
https://blog.qtum.org/@jb395official









A common question from people staking on Qtum is: “when do I get my block reward?” and “why is it taking so long?” This blog answers these questions with a gentle introduction to probability, studying actual blockchain results, and running some simulations.

TL;DR: Since Qtum block rewards are given in a random process, we used several approaches to answer the question “when block reward?” The wallet’s “Expected Time” is a probability term for the long-term average of a random process. Over many block rewards, 63% of the time a wallet will receive a block reward before the Expected Time, but the random process means that block rewards could come much sooner than the Expected Time, or much later.

The random spacing between block rewards will average out in the long run, but individual block rewards can have significant variation, and for longer spacings, this can be frustrating. On the long spacing side, users have reported spacings of 6 to 10 times the Expected Time, with one Reddit user reporting 13 times. Of course, no one complains when their block rewards come much sooner than the Expected Time, and this variation is all part of the random lottery process for block rewards.

To confirm your wallet is set up properly for staking, check these things:



  •    Wallet updated to the latest version
  •    Syncing to the latest block
  •    Unlocked for staking only
  •    Computer clock set correctly [Reference 1]


There is some math coming up below, but you can skip the math and just look at the charts and tables, which give the answers.






Probability 101





You intuitively know how probability works for dice. Probability lets us make calculations about random events like rolling dice (or Qtum block rewards). We will start considering a die (a single dice) and define success as rolling a “1”. You expect to get a “1” every 6 rolls (“Expected Time” = 6), but also know you are not guaranteed to get a “1” every 6 rolls because this is a random process.

The probability of an event occurring is given on a scale of 0 (will never happen) to 1.0 (definitely going to happen). The probability of getting a “1” in a single roll of the die is 1/6 or 0.167.

We can use this same approach to calculate the probability of winning a Qtum block reward for the next block. To make the math easier, let’s consider a wallet with 20,000 QTUM, and a Network Weight of 20,000,000. The wallet software makes the probability of winning a block reward 20,000 / 20,000,000 = 0.001. What does this mean, compared to the die?





Here we see the probability of success for a single trial, getting a “1” in a single roll of the die, or a block reward on the next block, and the Expected Time to the successful result.

This “Expected Time” is the same answer given by the Qtum wallet for a given wallet weight and network weight, which the wallet calculates based on the difficulty of minting a new block. For our example, the expected time is 1,000 blocks or about 40 hours.

Reference 2 shows a calculation for the probability of getting a “1” within 6 rolls of the die (33.5%) and for getting a block reward by the Expected Time (63.2%).


Blockchain Results


To test our understanding of block reward probability let’s look at some actual results on the Qtum blockchain (data sources and methodology given in Reference 3). We can compare the theoretical (calculated) probability with the experimental (observed) probability. An ideal candidate for this experiment would be a wallet that began staking soon after the launch of Mainnet and has had no additions or withdrawals. We won’t adjust for changes in network weight over time or the increase in wallet size due to block rewards and will assume the wallet stayed online the whole time. Also note the experimental wallet received fewer block rewards early on because they didn’t split their UTXOs into small amounts, like this.

To get enough block rewards to analyze we can look for a big wallet and find one that started with about 19,000 QTUM in mid-October 2017, and with block rewards have grown to the 20,500 range (in the mid-300’s on the rich list). To get a sense of how smaller or larger wallets would work, simply scale the results below up or down linearly. For example, a wallet staking 500 QTUM would see block reward spacings 40 times larger than our experimental wallet.

In 580+ days of staking this wallet won hundreds of block rewards. To see the variability in block reward spacing, here is a chart of 100 spacings of sequential block rewards for the wallet:


Block Reward Spacing Sequence^



How to read this chart? The horizontal axis is 100 sequential block rewards for our experimental wallet. The vertical access is spacings in hours. You can see some significant variation, for example, block 18 had a spacing of 7 hours and block 19 had a spacing of 333 hours (almost 14 days).

The average spacing for all the block rewards was 40 hours, the closest spacing between block rewards was 21 minutes, and the longest spacing was 13 days 21 hours.

For this wallet, the plot of sorted spacings between block rewards shows a linear section with a rising tail on the right side which leads to the long spacings:






How to read this chart: the vertical axis shows spacing in hours between block rewards and the horizontal axis shows the sorted sequence of the actual block reward spacings.

Why is there a long tail on the right side? This is due to the fundamental nature of determining “success” by selecting a small target range of the random numbers provided by the SHA256 hash algorithm. There is a real chance that the wallet can have a run of “bad luck” and not win a reward for many blocks. This long tail is similar to results rolling the die. For example, the Expected Time for rolling a “1” is 6 rolls, but 1% of the time, you won’t get a “1” for 25 rolls. That is the long tail from random numbers.



Network Weight


Because we have all the data in hand for this wallet, it is easy to calculate the long-term average Network Weight which looks like this:

Wallet Weight x (total blocks/block rewards for this wallet) = Network Weight

20,000 x 994 = 19.9 million

This would represent an average Network Weight from the mid-October 2017 starting date, and represents (without compounding) a 4.4% annual return.



Simulation


Manually analyzing blockchain data is tedious, so a Python script can be used to simulate block rewards and the spacing between them. The simulation uses the SHA256 hash algorithm as the random number generator (same as Qtum Proof of Stake consensus code) and can be run for many block rewards (GitHub link to simulator, data set, and charts). For a simulation similar to the experimental wallet above, we can use a wallet with 20,000 QTUM, a Network Weight of 20,000,000, and run for 2,000 block rewards which required approximately 2 million blocks (the equivalent of 9 years):





This simulation had an Expected Time of 1,000 blocks (40 hours). For a wallet this size, in 9 years there were 2 back-to-back block rewards and the longest spacing between block rewards was 12.4 days. The 5% quickest block rewards were less than 108 minutes and the 5% slowest block rewards were longer than 4.9 days. For probability geeks only, see reference 4.


Brain Teaser

Rolling the die or trying for a Qtum block reward are called “Independent Trails” in probability, which means each roll of the die or Qtum block reward is a new probability event with an identical chance of success. The previous results have no influence on the results for independent trials. Contrast this, for example, with double-deck Blackjack, and if you can count cards this is not a game with independent trials.

With charts for the experimental wallet and simulated wallet, we can definitively say when the next block reward will come: it is going to be one of the dots on these charts, which is not a useful answer.

Brain scan courtesy National Institute of Mental Health, National Institutes of Health, Department of Health and Human Services



Let’s look at “Expected Time” more, with a brain teaser. For our experimental and simulated wallets, the Expected Time is 1000 blocks (about 40 hours). After half the Expected Time has elapsed from the last block reward, what is the Expected Time to the next block reward?

Answer: The Expected Time is still 40 hours!


This has to be true because of independent trials. The Qtum SHA256 hash random number generator lives in the moment, has no history, and can only tell who wins the next block reward. “Independent Trials” means each new block reward, like each roll of the die, is independent of any previous results.

To get a more useful answer for “when block reward?” let’s look at some more probability and the Pareto Line chart.


% Chance of Block Reward

What would be useful for “when block reward?” is something like a weather forecast that says there is a “50% chance of rain.” This doesn’t mean it is definitely going to rain, or definitely not rain, but you know that about half the time, you are going to get wet. How can we use probability to give a similar forecast for block rewards?

The answer is the Pareto Line, which gives the cumulative percentages of block reward wins, as referenced to the Expected Time. The chart below is based on the 9 years of simulated block rewards, but the experimental wallet and theoretical probably calculations give the same line:



% Chance of a Block Reward for a given multiple of the Expected Time



How to read this chart? The horizontal axis gives the multiple of Expected Time. The vertical axis gives the percent chance of a block reward. The red lines show that there is a 63% chance of receiving a block reward before the Expected Time. This means after your wallet receives 100 block rewards, about 63 of them will have arrived before the Expected Time.

Here is a handy table which gives the % chance of block rewards for various points along the Pareto Line.



Taking the bottom row, a wallet would see a block reward 95% of the time before 3 times the Expected Time (120 hours) and would not get a block reward 5% of the time over the same period.









References

1,   To see if your computer clock is set correctly the command “getnetworkinfo” should give a “timeoffset” value of 0 or a few positive seconds.

2,    We can’t use probability directly to calculate success over multiple trials. However, you can calculate the probability of failure over multiple trials which is the product (multiplication) of the individual failure probabilities.


The probability of not rolling a “1” with the die is:

1.0 minus (probability of “1”) which is 1.0-0.167. = 0.833

This makes sense because there are 5 ways out of 6 to roll a number other than “1”. Probability math says the probability of not getting a “1” for 6 rolls is 0.833 multiplied by itself 6 times:

0.833 x 0.833 x 0.833 x 0.833 x 0.833 x 0.833 = 0.335

This means for a large number of die rolls, we would not get a “1” in 6 rolls 33.5% of the time. Then to calculate the probability of getting a “1” within 6 rolls we can subtract 0.355 from 1.0:

Probability of getting a “1” within 6 rolls = 1.0–0.335 = 0.665

which means for a large number of rolls, we should get a “1” within in the first 6 rolls 66.5% of the time.

Using the same math for a wallet with 0.001 probability of winning a block reward gives the probability of not getting a block reward of 0.999. The probability of not getting a block reward in the 1000 blocks (Expected Time) is:

0.999 ** 1000 = 0.368

Here we multiply 0.999 by itself 1,000 times (0.999 is the base and 1,000 is the exponent).

The probability of getting a block reward by the Expected Time is then 1.0 minus the probability you don’t get a block reward:

1.0 - 0.368 = 0.632

Which means over many block rewards you will get the block reward within the Expected Time 63.2% of the time.


3, Data from the qtum.info API, using these URLs with screen scraping into Excel:


All the transactions for a given address:

https://qtum.info/api/address/<Qtum address>/utxo


Get transaction details including whether this transaction initiated a block reward:


https://qtum.info/api/tx/<transaction ID>


4, Some probability results for block reward spacings


Experimental Wallet

Average: 39.8 hours

Median: 23.6 hours

Variance (total population): 2289.9 hours squared

Standard Deviation (total population): 47.9 hours



Simulated Wallet

Average: 39.9 hours

Median: 28.6 hours

Variance (total population): 1636 hours squared

Standard Deviation (total population): 40.5 hours

5. Learn about probability on Kahn Academy, Probability

6. More Jackson blogs https://medium.com/@jb395official









Qtum Telegram Channel: https://t.me/qtumofficial














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May 29, 2019, 03:06:18 AM
 #6337

nice to see the updates come back. still hold a lot of my Qtum
wait people find the long term Value of Qtum.

running farm worldwide
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May 31, 2019, 07:29:33 AM
 #6338

even price going up a little, but seems bitcointalk is still not active like the old days..

running farm worldwide
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June 01, 2019, 08:32:44 AM
 #6339

Lots of good updates, the integration with the MCO card so it can be used with visa is the most impressive. Hopefully we will see some examples or demos of people using QTUM in the real world

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June 01, 2019, 08:46:59 AM
 #6340

bought 1000 qtum and set a masternood Grin
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