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741  Other / Politics & Society / Re: Sexbots. Will you be indulging? on: July 13, 2017, 04:43:45 PM
Lots of people seem to moaning with increasing intensity about the rise of sexbots. Some are claiming there'll be moral dilemmas as I assume a proper one will need some type of sentience.

Personally I can't ever see myself going for it. If I'm not imagining some bored Foxconn slave testing out the muff I'm slobbering all over, I'll be trying to catch it out like early text only adventure games by throwing out surreal suggestions.

Are you already saving up or will you stick to donkeys and greased holes in the ground?

Lol, never. There is sexual fantasy and reality. Everyone who watches porn at least once would fantasize about something. Now just for the sake of comparing, let's assume that indulging in a sexual activity with ones wife or gf is reality, there is ample room for fantasy here, but still connected to reality.

With sex bots the whole notion of reality is gone, it is just trying out plain or complicated fantasies on a dead, non-breathing object. Too much diversion from reality which would end up in a person becoming highly psychologically unstable. AI sex bots is a possibility in the near future and it wouldn't be a surprise if sex bot brothels start to pop up.

Then there is VR porn. IMO, this industry is going to boom in the next few years. Not same as sex bot in the sense it is fantasy applied virtually rather than on an inanimate object.
742  Bitcoin / Bitcoin Discussion / Re: Photos: Life inside of China’s massive and remote bitcoin mines on: July 13, 2017, 02:33:40 PM
Jesus....how can you compete with this. I bet they don't pay for elecricity..

They do pay, but India and China have the lowest electricity prices and most importantly China is the world's top most producer of renewable electricity, hydro and coal power.

China is leading with bitcoin mining, bitcoin trading volume, manufacturing of bitcoin equipments. As far as the Chinese government thinks bitcoin mining operation is not affecting their economy they wouldn't mind sharing their excess, cheap electricity with miners.
743  Bitcoin / Bitcoin Discussion / Re: Why everyone are nervous for the segwit2x fork? on: July 13, 2017, 10:52:19 AM
My question is simple.
Why anyone are nervous about the segwit2x hard fork part and not support this guys to fork off from network forever.
I dont think the fork chain will survive without skill devs and without majority of users to support it.
Will be a very risk business for the forkers to maintenance their network and to survive in long term especially without skilled developers.
In the other hand Bitcoin devs, users and everyone in bitcoin ecosystem imo must support them to fork off from network.
After their fork this silly non tech and conspiracy theories noise will go away and bitcoin will return and focus to tech innovation.
The future of bitcoin is great and will be much better without shadow characters like Jihan, Roger Ver, Garzik, Gavin, Wright.

Apart from Garzik, I haven't heard of any other developers working on Segwit2x. Segwit was coded by the core developers over a considerable period of time with many testings and successfully activated on Litecoin. Segwit2x lacks developers and the whole coding is being hurriedly carried out to push the 2 MB hard fork agenda.

Majority of miners have shown the intent to signal Segwit2x by July 21 and if a large number of miners doesn't back out then Segwit would get activated through Segwit2x. On the other hand, if Segwit2x fails, UASF would activate Segwit and Bitmain had earlier threatened the network with UAHF if Segwit2x fails.

The agenda of this mining cartel is quite simple, not to activate Segwit, but to fork the network either through Segwit2x (three months after Segwit activation) or by threatening the community with a possible UAHF.

I don't think the second part of Segwit2x would get any economic majority and the same thing with Jihan's illusionary UAHF. If he wants to pull off a hard fork with minority, let him do it, another altcoin to the list of thousands, and bitcoin would be free of the likes of Jihan, Ver, and CSW who apart from trying to control the network, have nothing substantial to contribute to the network.

Most of the newbies don't really put an effort to understand what is happening to the network. They just focus on the word split and start worrying about its impact on bitcoins price, they have the right to be concerned, but when you look at the broader picture, once Segwit gets activated, it would be smooth sailing.
744  Bitcoin / Bitcoin Discussion / Re: Why do people fear 1st Aug hardfork? on: July 13, 2017, 05:18:52 AM
A lot of people are fearing the hard fork because they don't want to end up with two different types of bitcoin.  There are also some reports floating around that in the event of a hard fork, that if one of the chains doesn't survive, that some of the really old transactions would effectively be erased from the blockchain.  Whether there is any truth to that, I don't know.

Also certain hot wallets like Coinbase have openly stated they would only support one type of scaling option i believe.

1. That is why storing your bitcoins offline is the best option. As far as you have the private keys and your funds are not stored in exchanges, I don't think your coins would split in two, you have the full freedom to choose a chain of your choice. Some exchanges would give you the option to split your coins into two chains or move to a single chain, some exchanges based on their rules would split your coins without your consent, and maybe exchanges like Coinbase would only list a single coin.

2. In case of a split, all exchanges would stop buy/sell options maybe up to 24 hours to prevent any issues arising from replay attacks and network instability/vulnerability.

3. The split might be short-lived, based on economic majority, one chain would get the better of other and split would be over. Or it could go over a longer period of time, Ethereum Classic vs Ethereum is an example.

4. A soft fork adds new rules to the existing rules in the network, but a hard fork removes the existing rules and adds new so I guess a HF would make old transactions to be erased from the blockchain. Maybe I am wrong.
745  Bitcoin / Bitcoin Discussion / Re: BP 148 or Segwit? Which one are you hoping happens before August 1st? on: July 13, 2017, 04:09:03 AM
Alright!

By now if you really big into bitcoin and cryptocurrency you've heard about the scaling debate. Tell me what you hope happens before August 1 and why?

as somebody who is not a programmer I think it sounds to me like SegWit is the better and more likely option, but I want to know what the community has to say!

For other non-programmers out there who don't know what I'm talking about, read this article: https://coinjournal.net/bitcoin-now-likely-get-segwit-august-1st-avoid-chain-split/

It is not BIP 148 (UASF) vs Segwit. It is UASF vs Segwit2x.

The purpose of both UASF and Segwit2x is to activate Segwit, but the latter is designed to hard fork the network three months after activating Segwit.

I think most of the bitcoin users want Segwit to be activated, be it through UASF or Segwit2x. If UASF does it then there would be a chain split, but it would be good for the community in the long run, no future uncertainties. If Segwit2x does it then a split in August would unlikely happen, but I don't agree with hard forking the network, a few individuals having the power to enforce their propaganda on the whole bitcoin community, too much centralization, and forcing bitcoin through random periods of uncertainty.

If UASF activates Segwit, awesome, if Segwit2x does it, okay (they would be having a hard time getting support for their 2 MB part)
746  Bitcoin / Bitcoin Discussion / Re: Why do people fear 1st Aug hardfork? on: July 13, 2017, 03:39:06 AM
The first part of Segwit2x is a soft fork, 2 MB part is the hard fork. If I am right there would be no hard fork around August, but yeah a minute chance of chain split is there.

1. Segwit2x activates Segwit with 80% majority before August 1 and then tries to hard fork the network around November (this is not likely going to happen, majority of the bitcoin community wants Segwit to be activated, hard forking the network wouldn't get much support).

2. Segwit2x has shown the intent to start signalling Segwit by July 21, if a few miners back out and they lose majority, UASF would be deployed on August 1 and there would be a chain split.

In August, Segwit would get activated either through one of the soft forks. The possibility of a chain split can't be ignored.

As a precaution, just don't keep your bitcoins in exchanges or online wallets, store it offline, your coins wouldn't get affected in any way if a split happens in August.
747  Other / Politics & Society / Re: Is there going to be WAR in China and India ? on: July 12, 2017, 12:54:06 PM
if you watch the news then must have known there are some tense situations on border of India-Bhutan-China tri-border

there are Indian and Chinese troops in standoff .

1) do you think there will be war between India and China ?

2) How will it affect India ? or China

imho, war is never the solution .,


Quote
Tibet today is one of the most repressed and closed societies in the world. China invaded Tibet in 1950. Inside its borders and across the world, Tibetans have never stopped believing Tibet is a nation. After more than 60 years of occupation, Tibetans still resist China's rule and defy its oppression. More than one million Tibetans have died as a result of China's occupation.

https://freetibet.org/about

China is now fooling around with Sikkim.

Quote
There are three specific reasons why China's economy managers should think twice before nodding in agreement with military for another war with India.

One, there is a high cost involved for the Chinese economy, particularly its manufacturing sector.

Second, India’s growing dominance in the world economy and its strengthening diplomatic relations with world powers.

Third, China is in the midst of expanding its economic reach in South Asia through its much-hyped China-Pakistan Economic Corridor (CPEC), which is critical to its One Belt, One Road (OBOR) initiative.

http://www.firstpost.com/india/sikkim-border-dispute-another-war-with-india-will-be-an-economic-blunder-for-china-3796365.html

A war is highly unlikely, but if that happens, a full-fledged war between India and China, something like this would happen, when elephants fight, it is the grass that suffers.

Quote
You can no more win a war than you can win an earthquake. Jeannette Rankin
748  Economy / Web Wallets / Re: I can't login to blockchain.info due to "EMAIL CODE (2fa)" on: July 12, 2017, 12:03:43 PM
Hi guys,
What is the best thing to do at this moment to login to my blockchain wallet?

Last 2-3 hours I have been trying to login, but due to the "Email Code" I am unable to login.

It will be appreciated if someone helps me out.

B. regards

Blockchain wallet is a bit buggy, sometimes their authorization email is down for all users, but I just tried to log into my account and received authorization email (using gmail) and 2 FA code on my mobile immediately, this is a problem at your end. Sometimes the email may take up to 30 minutes to arrive. Clear your browser cache and cookies and try again or use a different browser. Authorization email delivery issue usually gets resolved on its own.

As far as 2 FA code is concerned, you can disable 2-step Verification via SMS in the security settings. Reverify your number and then enable 2 FA, it should work.

The recent phishing trend and wallet authorization basics, https://blog.blockchain.com/2017/05/02/phishing-trend-wallet-auth-basics/

Always check whether the email is from, no-reply@blockchain.info
749  Bitcoin / Bitcoin Discussion / Re: Bitcoin after 1st august = Unstoppable? on: July 12, 2017, 11:06:18 AM
SegWit2x looks like won't ready before 1st August since SegWit2x testnet failure, so i UASF should have more support and will be activated and will become majority chain if block/chain split happen.
But i think we still need lots of upgrade which allow bitcoin network process hundred of transaction every second while still decentralized before bitcoin is really unstoppable.

Either through Segwit2x or UASF, bitcoin would have Segwit activated by August 1. The glitch in Segwit2x testing was attributed to mempool being empty due to testnet and someone intentionally messing up with the chain before the developers intended to start the test, but yeah the concern over how the mainnet deployment plays out is real. The whole coding process of Segwit2x has been a rushed affair, if some serious bugs pop up when it is added into the main network then there would be serious implications for the whole bitcoin community.

UASF is a much safer option than Segwit2x, but it looks it would be Segwit2x activating Segwit, the hard fork isn't a matter of concern right now, most probably it wouldn't even happen.

Yeah once Segwit gets activated further side solutions can be implemented to make bitcoin unstoppable. Segwit is the stepping stone.
750  Bitcoin / Bitcoin Discussion / Re: Bitcoin buying by central banks on: July 12, 2017, 05:29:35 AM
Does anyone know if btc market cap goes above 50 bln will the central banks be able to buy bitcoin. with only 21,000,000 coins available there could be a quick run up with people hoarding them,so how do they work that out. Just print money 24/7 and buy up all bitcoin.Cheers, JCBTC

1. Governments of countries that are legalising bitcoin might decide to buy small portions of bitcoin as a reserve. In such a situation, bitcoin price would hit the moon. Hoarders wouldn't definitely part with their bitcoin even at this point. Bitcoins are divisible, governments trying to buy all of the bitcoin in circulation would result in making millionaires out of people who own even a few satoshis.

2. Just hoarding doesn't give bitcoin value, it needs to be in circulation to keep the speculation and demand in alignment. Governments move to buy all bitcoins would end in bitcoin breaking all the records making millionaires even billionaires in the process and then the their move to hoard all the bitcoin would kill the demand and speculation. The governments would be shelling out billions to own a dead bitcoin. Would they do it? No.
751  Bitcoin / Bitcoin Discussion / Re: Are we moving towards the Global Crypto Currency Depression? on: July 12, 2017, 03:50:38 AM
As per coinmarketcap website, we have 970 crypto currencies available at this point of time. If we sort the list by clicking on Change (24h) column, I can see that price of only 13 coins were increased in last 24 hours. Rest all coins are facing the depreciation.

Even bitcoin price is standing at 2359 USD at this point. Are we moving towards a Global Crypto Currency Depression? What's causing this massive depreciation?

The market cap of all cryptocurrencies was around $116.5 billion in mid-June and today less than $78 billion today so yeah it could be said that cryptocurrencies are going through a temporary depression. Ethereum took the worst hit and it is expected, market is being flooded with ICO sell orders. Bitcoin and altcoin prices are correlated to some extent. Compared to altcoins, bitcoin is still more stable, there would be some uncertainty in the market until August 1.
752  Bitcoin / Bitcoin Discussion / Re: Is This A "Willy Bot" In Action? on: July 12, 2017, 03:05:59 AM
We all know how Mt Gox manipulated bitcoin price by creating "Willy Bot". I'm wondering what stops others from doing the same? I mean anyone with enough resources can easily develop such bots and manipulate the market as per their need.

Right now bitcoin price is dropping and everyone thinks it's due to the fear of what might unfold on August 1. Is it not possible that some whales might be using this situation as a cover up to manipulate the market yet again?
Quote
In fact, on some trading ways, Willy accounted for 30-50% of Mt Gox’s entire trading volume. That is a significant amount, to say the least, indicating someone was carefully manipulating the bitcoin price in the process. No one will be surprised to learn there was some manual intervention by the person responsible for using the trading bot on the Mt. Gox exchange. Most people still believe Mark Karpeles is the person responsible for manually driving up the bitcoin price, although it is doubtful we’ll ever know the truth.

https://themerkle.com/what-is-the-willy-bitcoin-trading-bot/

At that time, Mt Gox was the most popular bitcoin exchange, so manipulating the price through a single source was easy. Right now it is spread out. Newbies are the panic sellers, August 1 uncertainty, coins being moved offline, and then a price drop and the short-term investors start panicking and dumping. Yeah whales could easily manipulate an uncertainty to buy low and sell high. Sensible approach would be to just hold on to your bitcoins and let things settle down.
753  Bitcoin / Bitcoin Discussion / Re: What would be the fairest way for votings ? on: July 10, 2017, 03:41:15 PM
I think voting by coins is more or less unfair and nowhere a democratic system. Your vote is affected by your wealth.

Voting by address is more or less complete stupid, because you can generate as much as you like.

Voting by hashpower is centralized.

Voting per full node? Can this be implemented, or can this be manipulated ? (I know you can add a comment which your node is brodcasting, but that´s not really voting)

Is there any other way how we could realize a democratic system for the votings? (f.e. per id like political votes in democratic systems, without revealing your id ?)

Voting by wealth is plutocracy, a smaller version of aristocracy.

Voting by hash power is meritocracy, need merit or it is just a  forced sub division of plutocracy.

Democracy has a simple explanation, by the people, for the people, to the people, simplest form, but gets complicated when governments interfere.

PoW to PoS to PoA, guess its possible to change the algorithm to proof-of-activity, never good at technicalities.

Voting is just an illusion, end product is always dependent on how an user prefers to use it, economic majority.
754  Bitcoin / Bitcoin Discussion / Re: [Poll] Will you use Jihancoin? on: July 10, 2017, 02:45:58 PM
Bitcoin has its roots strongly held and believed on decentralization, disrupting the network, a coup, is just the beginning of a centralized bitcoin network, and then they blame the LN/side solutions that are an optional choice. A decentralized network has to give the users a choice.

Most of the bitcoin users don't give a shit about what's happening to the network, they are capable enough to grasp the implications, but money clouds their vision, short term profit, long term a dead coin.

Minority is enough to start with a change, underdogs. Segwit activated, good, HF, Jihan is gonna realize he is dreaming a dreamer's dream.
755  Bitcoin / Bitcoin Discussion / Re: Accidental Mining Fees on: July 10, 2017, 06:21:20 AM
I just read in this article how someone made a transaction including 80btc as the transaction fee which eventually btc.com mined the block. That is an outrageous fee I must say and how on earth would someone make such a mistake. Such a thing was also reported to have happen with even a larger fee which no one came back to claim. The questions that arose in my mind are;
1. Do you think a sender can really make such a mistake or there is someone who just deliberately and randomly want so donate btc to any miner that ends up mining their block?
2. If this kind mistakes happen, do you think there should be a reclaim or we just assume it is the miner's luck?

What are your thoughts?

Here is the link to the article:
https://news.bitcoin.com/mining-pool-btc-com-80-btc-fee-refund/

1. It is possible if the sender is drunk or high on something Grin...We do messup with the keyboard sometimes. Not deliberately, btc.com pool mined it, no prediction on who the miner blocks it, just random, and the random person got lucky.

2. Bitcoin is no PayPal, you sent it, its gone, over. The miner or the recipient can easily get away with a transaction not meant to be theirs.

Quote
We’re not interested in making a quick buck, especially if it comes at the loss of another bitcoiner. That’s why we’re reaching out.

That is some good moral sense.
756  Bitcoin / Bitcoin Discussion / Re: Hard Fork - August 2 on: July 10, 2017, 05:37:28 AM
Come on, the consolidation of mining operations, and therefore a handful of "people" controlling the blockchain will happen regardless of transaction throughput size. It's an economies of scale fact. As it becomes harder to mine the independent miners will wash out leaving only the biggest of operations conducting the work at a profitable pace. The only thing slowing down this eventuality is the price appreciation of bitcoin.

I am not against bigger blocks, but not at the cost of bitcoin network being controlled by a single entity or a couple of individuals.

1. Manufacturer of mining equipments want to control the network. Can it be more centralized?

2. There was ghash pool that hit 51%, and there is Chinese mining cartel with more than 51% combined.

3. Chinese government isn't in favour of bitcoin, a centralized decision to ban bitcoin in China would end up in taking down half of the decentralized bitcoin network.

Spam attacks, threatening the community because you own half of the network, is this the way to find a scalable solution?

Increasing block size is just a temporary solution. LN, sidechain/drivechain, extension blocks is a necessity if bitcoin needs to be used as an appropriate medium of exchange.

Can you please explain to us why this is a temporary solution? If extension blocks are ultimately needed then we should just make the transfer to that end.


Yeah, a major portion of bitcoin mining would get restricted to a particular country or an organization, as far as they are mining, no problem, but when they start using their mining majority to enforce their propaganda on the community, it is a problem.

LN would make transactions instant with the lowest fee. With bigger blocks, you order a coffee, drink, wait for the transaction to get confirmed, pay. With LN, you order a coffee, confirmed, pay, and drink. Just an example of not online, but how offline merchant payments would become a lot more feasible.

Which wallet do you use? Around 145 GB to synchronize blockchain. Obviously if bitcoin gets adopted on a large scale, the above figure wouldn't be limited to three digits. Increased block size, on chain transactions would get confirmed quickly with less congestion, but the network is always growing. The purpose of bitcoin is instant worldwide transaction with lowest fee, a side solution needs to be integrated into the network for this, that's what I meant by bigger block size isn't enough.

Segwit 2 MB, Segwit2x 4-8 MB. Right now remove spam dust transactions and 2 MB is more than enough for transactions to get confirmed, implement side options, bitcoin users would have the freedom to choose what method of transaction they want to use. Fork the network, users don't have a choice. It's as simple as that.
757  Bitcoin / Bitcoin Discussion / Re: Hard Fork - August 2 on: July 10, 2017, 04:26:39 AM
Personally, I don't want bitcoin to split. It is a confusing process and it will affect the businesses and merchants who allow Bitcoin as payment. It will basically stuff up the entire Bitcoin landscape. However, I still think we need to implement SegWit. Block size is a big issue and if we can actually reduce the space that a transaction takes up by 60%, then it will sole many problems, for now. But in the future we would probably need to use another method when more people become involved into Bitcoin.

What do you think?

EDIT: Sorry about the title. I meant to write August 1. Is there anyway I can edit that?

I am not against bigger blocks, but not at the cost of bitcoin network being controlled by a single entity or a couple of individuals.

1. Manufacturer of mining equipments want to control the network. Can it be more centralized?

2. There was ghash pool that hit 51%, and there is Chinese mining cartel with more than 51% combined.

3. Chinese government isn't in favour of bitcoin, a centralized decision to ban bitcoin in China would end up in taking down half of the decentralized bitcoin network.

Spam attacks, threatening the community because you own half of the network, is this the way to find a scalable solution?

Increasing block size is just a temporary solution. LN, sidechain/drivechain, extension blocks is a necessity if bitcoin needs to be used as an appropriate medium of exchange.

Quote
The ability for a protocol change to be successfully implemented ultimately rests with those who accept bitcoins in exchange for value.

Let the economic majority decide.
758  Other / Politics & Society / Re: Why God exists in all people mind? on: July 08, 2017, 05:25:37 PM
Quote
Every human has four endowments - self awareness, conscience, independent will and creative imagination. These give us the ultimate human freedom... The power to choose, to respond, to change - Stephen Covey

Majority of humans possess these four characteristics, a few idle minds don't.

1. Self-awareness begins where self-sufficiency ends. You would never be aware of yourself if you are not self sufficient.

2. Conscience is a moral sense of right and wrong. If you aren't self-aware how do you know what is right and wrong. There is a proverb, conscience is like a dog which doesn't bite, but barks incessantly. Having a conscience leads to independent will.

3. You aren't aware of yourself, you can't distinguish between right and wrong, you don't have an opinion of yourself, then there is no independent will. Being aware and having a conscience is the way to independent will.

4. Einstein had said:

Quote
Imagination is more important than knowledge. For knowledge is limited to all we now know and understand, while imagination embraces the entire world, and all there ever will be to know and understand.

To imagine you have to be synched with the above three steps. All the major inventions in this world are the works of creative imagination (infinite) backed by infinite intelligence turned to reality.

This is ultimate freedom. Now why God exists in human mind is quite simple,

Some people end up finding God in one of these endowments, some people think they found God without any of these endowments, atheists blame God without having any of these endowments, atheists blame God after having ultimate human freedom.

Would there be a lack of people integrating God into their self-awareness, conscience, will, imagination? No. So God will exist in human minds. And if they prefer to worship or follow this God they are free to do so because they have considered it equal to their ultimate freedom. Nothing wrong in it.
759  Bitcoin / Bitcoin Discussion / Re: Wanna Cry new ? please help (cryptolocker Petya) on: July 08, 2017, 09:57:09 AM
Hello, guys !
Please help with in fighting the virus.

At the wife at work the server and other computers picked up a virus similar to WannaCry
(All except the wife's computer, to which I installed Comodo)

The server is a laptop without antivirus and firewall.
All important information is stored on the server.



Bitcoin address and email:
1Mz7153HMuxXTuR2R1t78mGSdzaAtNbBWX
wowsmith123456@posteo.net


Private Decryption Key For Original Petya Ransomware Released

The creator of the Petya ransomware, Janus has released the master decryption key. This key can decrypt all the files that have been encrypted by all three versions of Petya, red, green, and yellow. This key is unusable against the modified version of Petya, Notpetya that targeted computers of critical infrastructure and corporations in Ukraine as well as 64 other countries.

http://thehackernews.com/2017/07/petya-ransomware-decryption-key.html?m=1

https://twitter.com/JanusSecretary/status/882663988429021184
760  Bitcoin / Bitcoin Discussion / Re: Developers of BitCoin on: July 08, 2017, 09:18:14 AM
Excuse me if its a novice question but I really have no idea about it and would like to learn.
So we know that Satoshi created bitcoin, alone or with a team that we don't know(or do we?)
But now, as there are talks of making some changes or adjustments in the bitcoin(don't know if it has happened before or not), but who are gonna make those changes? Who are those developers that can do that?
And if it is open source, can a single person (or a few for that matter) make changes in it?
Would really appreciate some beginners guide on this.

Quote
Nobody owns the Bitcoin network much like no one owns the technology behind email. Bitcoin is controlled by all Bitcoin users around the world. While developers are improving the software, they can't force a change in the Bitcoin protocol because all users are free to choose what software and version they use. In order to stay compatible with each other, all users need to use software complying with the same rules. Bitcoin can only work correctly with a complete consensus among all users. Therefore, all users and developers have a strong incentive to protect this consensus.

https://bitcoin.org/en/faq#who-controls-the-bitcoin-network

All users are free to choose what software or version they want to use. Adding some new rules to the existing protocol (core) is a soft fork while removing the existing rules is a hard fork. Now a hard fork isn't backwards compatible, users would be forced to use this version whether they like it or not.

Quote
These rules are called consensus rules because Bitcoin requires that all participants in the Bitcoin economy have consensus as to the consensus rules. If the economy disagrees about the consensus rules, then the currency and economy splits into two or more totally-independent pieces.

https://en.bitcoin.it/wiki/Consensus

Could a single person make changes to it? Guess that's what is happening, bitcoin is open source, but with centralized mining the users doesn't have much choice.

Quote
As long as mining is conducted for economic gain, then any change adopted by the miners needs to be supported by the economic majority for it to be successfully implemented.

If there are changes to the protocol that are not welcomed by those who want bitcoins but the changes are adopted by miners regardless, then the coins mined (starting with the first non-compliant block mined) would not be recognized by those who didn't adopt all the changes. Thus those miners would then, in that instance, not gain economically from introducing any changes that the Economic Majority didn't want. This outcome would be the same regardless of whether or not the miners that attempted to make the changes had 51% of the hashing capacity.

So the ability for a protocol change to be successfully implemented ultimately rests with those who accept bitcoins in exchange for value.

https://en.bitcoin.it/wiki/Economic_majority

https://bitcoincore.org/en/team/
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