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1  Bitcoin / Bitcoin Discussion / Re: How about a bitcoin coinstar? on: January 18, 2019, 10:40:56 PM
How about a bitcoin coinstar? Seems like a great idea to me. You put coins in there, converts it to Bitcoins.

Great idea!


Coinstar machines will start selling Bitcoin at the grocery store
- https://techcrunch.com/2019/01/17/bitcoin-coinstar-coinme

Sorry to necrothread, but whatever.

Lesson here, eventually nearly all financial services will be impacted by Bitcoin.
2  Economy / Service Discussion / Re: What about Coinstar? on: January 18, 2019, 10:39:00 PM
Well from the looks of things I doubt they'll do it any time soon with all these exchanges getting shut down.

Maybe not soon, but eventually.

Sorry to necrothread, but whatever.

Coinstar machines will start selling Bitcoin at the grocery store
- https://techcrunch.com/2019/01/17/bitcoin-coinstar-coinme

Lesson here, eventually nearly all financial services will be impacted by Bitcoin.
3  Other / Beginners & Help / Re: Petition to Coinstar to trade change for Bitcoin on: January 18, 2019, 10:35:20 PM
Sorry to necrothread, but whatever.

Success!

Coinstar machines will start selling Bitcoin at the grocery store
- https://techcrunch.com/2019/01/17/bitcoin-coinstar-coinme

Lesson here, eventually nearly all financial services will be impacted by Bitcoin.
4  Bitcoin / Project Development / Re: CoinStar on: January 18, 2019, 10:33:31 PM
Sorry to necrothread, but whatever.

Lesson here, eventually nearly all financial services will be impacted by Bitcoin.

Coinstar machines will start selling Bitcoin at the grocery store
- https://techcrunch.com/2019/01/17/bitcoin-coinstar-coinme
5  Bitcoin / Bitcoin Discussion / Re: A successful DOUBLE SPEND US$10000 against OKPAY this morning. on: January 03, 2019, 12:18:55 PM
Five years later, no block explorers still show Macbook-air's original transaction that had gotten double-spent after the block reorg.

Here's a list of seven transactions that (allegedly) had been confirmed on the v0.8 side of the fork, but were later double spent on the v0.7 side of the fork.
 
12814b8ad57ce5654ba69eb26a52ddae1bff42093ca20cef3ad96fe7fd85d195
cb36ba33b3ecd4d3177d786209670c9e6cdf95eb62be54986f0b49ca292714af
7192807f952b252081d0db0aa7575c4695b945820adaf7776b7189e6b3d86f96
355d4ea51c3b780cf0b10e8099a06a31484e0060bc140b63f3d6e5fb713ace5e
b961bc0c663a46893afd3166a604e7e2639533522d9fec61fdb95eb665e86f5a
138063e4bdb76feaa511f1e7f9c681eb468ef9140c141671741c965e503b84c6
a10bd194cdbf9aa4c12eb0b120056998a081a9b0d93d70570edff24dec831f90

Source: https://pastebin.com/raw/wctJU3Ln
6  Economy / Trading Discussion / Re: Tips for local transactions on: April 28, 2018, 09:25:31 PM


And yes, it continues to happen:

Bitcoin buyer robbed of RM1mil in cash
- https://www.thestar.com.my/news/nation/2018/04/13/bitcoin-buyer-robbed-of-rm1mil-in-cash

Heh, "A police spokesman told the Straits Times that they were also investigating the origins of [buyer]'s money, which he carried in cash."

And though no violence was involved, here's a very large deal where the buyer almost got scammed:

How an OTC Bitcoin Scammer Almost Stole $600 Million
- https://news.bitcoin.com/how-an-otc-bitcoin-scammer-almost-stole-600-million

Bitcoin ATM hit ... thieves assault cashier with bear spray, then pull the cash trays from the Bitcoin ATM (Chevron Gas Station Irving, TX)
- https://www.youtube.com/watch?v=lbImdks9gkM

"The gang used the office to lure the two brothers to come to the office to sell them the Bitcoin."
- https://gulfnews.com/news/uae/crime/watch-dubai-police-recovers-dh7m-from-bitcoin-heist-1.2213314
7  Economy / Trading Discussion / Re: Tips for local transactions on: April 19, 2018, 06:49:24 AM
Bitcoin ATM hit ... thieves assault cashier with bear spray, then pull the cash trays from the Bitcoin ATM (Chevron Gas Station Irving, TX)

- https://www.youtube.com/watch?v=lbImdks9gkM
8  Economy / Trading Discussion / Re: Tips for local transactions on: April 18, 2018, 05:04:45 AM
One of the main reasons someone does a transaction face-to-face, using cash, is to protect financial privacy.

Recently. LocalBitcoins began requiring account verification (referred to as KYC / identity verification) for all sellers.

Two alternatives, HodlHodl.com and Bisq.Network, are now functional, are useful for face-to-face trading, and do not require identity verification.
9  Economy / Trading Discussion / Re: Tips for local transactions on: April 13, 2018, 02:59:52 AM


And yes, it continues to happen:

Bitcoin buyer robbed of RM1mil in cash
- https://www.thestar.com.my/news/nation/2018/04/13/bitcoin-buyer-robbed-of-rm1mil-in-cash

Heh, "A police spokesman told the Straits Times that they were also investigating the origins of [buyer]'s money, which he carried in cash."

And though no violence was involved, here's a very large deal where the buyer almost got scammed:

How an OTC Bitcoin Scammer Almost Stole $600 Million
- https://news.bitcoin.com/how-an-otc-bitcoin-scammer-almost-stole-600-million

Bitcoin ATM hit ... thieves assault cashier with bear spray, then pull the cash trays from the Bitcoin ATM (Chevron Gas Station Irving, TX)
- https://www.youtube.com/watch?v=lbImdks9gkM
10  Economy / Trading Discussion / Re: Tips for local transactions on: April 10, 2018, 08:04:39 PM
How about OTC?

If you are referring to OTC as-in brokerages handling larger over-the-counter trades, here's a list:

- https://www.reddit.com/r/BitcoinMarkets/comments/7unl0s
11  Economy / Trading Discussion / Re: Tips for local transactions on: April 04, 2018, 01:23:52 AM
What exactly you mean by LOCAL TRANSACTION as cryptocurrency transaction are not confined to any area?

Local transactions is a term generally meaning in-person, face-to-face trading.  While there's no reason cash (e.g., USD) needs to be the payment method for a local trade, most local trades are for cash.

This thread is to help those minimize the risks when entering and conducting such a trade.
12  Economy / Trading Discussion / Re: Tips for local transactions on: February 27, 2018, 12:55:30 AM

It continues:

- https://en.bitnovosti.com/2018/02/26/criminals-extorted-300-btc-from-the-founder-of-prizm-cryptocurrency
- https://en.bitnovosti.com/2018/02/23/man-was-tortured-all-night-in-moscow-before-he-handed-all-his-bitcoins-to-bandits

And will continue to happen:

"The trend of physical crypto asset robberies will accelerate if attackers have a decent success rate. Securing your assets not only helps you, it helps us all by deterring physical attackers from even trying."

- https://twitter.com/lopp/status/961700837654441984
13  Bitcoin / Mining speculation / Re: Intro: U.S.-based ASIC design group w/ patent on reducing electrical consumption on: February 23, 2018, 09:53:41 PM
Here is more information about the technology and company:

- https://docs.wixstatic.com/ugd/b454a1_c0652f38a20c438eb9ab474bab1878ba.pdf

3B’s novel Unipolar Logic Circuit (ULC) - advantages:
- Enables NMOS or PMOS logic as low as 50% of CMOS power consumption
- Enables simpler fabrication of circuits – only NMOS or PMOS transistors, thereby reducing fabrication cost
- Reduces transistor count compared to conventional CMOS logic, thereby increasing operational speed and reducing power consumption and fabrication cost of logic circuitry
- Enables higher clock speeds compared to conventional CMOS logic or other unipolar logic schemes
- High density < 20F2 novel vertical unipolar logic gates
- Circuit validated via simulation on IBM 500nm and 90nm CMOS process nodes
14  Economy / Trading Discussion / Re: Tips for local transactions on: February 23, 2018, 09:23:49 PM
The other threat to your safety while performing a local trade: 

United States Department of Homeland Security


"On Friday Feb 9, I was arrested in my home by Department Of Homeland Security over a #Bitcoin transaction from nov 2016 and am released under a personal recognizance bond. I am being charged with:
18 USC 1956 - Money Laundering Instrument"

https://twitter.com/NODEfather/status/963860385336999936

They also confiscated his devices in which he holds cryptocurrency funds.

As-of Feb 22nd, Morgan Rockcoons (aka, Morgan Rockwell, and on Twitter: @NODEfather, and @Metaballo) plead not guilty and got a 10 day extension to get legal representation.

- https://twitter.com/NODEfather/status/966852090839486465
15  Economy / Gambling / Re: Using SHA512 hash as random number generator for Gambling services on: January 29, 2018, 08:57:09 PM
Sorry to append to such an old post, but this is relevant:

On Bitcoin as a public randomness source
by Joseph Bonneau, Jeremy Clark, and Steven Goldfeder

- https://eprint.iacr.org/2015/1015.pdf
16  Economy / Trading Discussion / Re: Tips for local transactions on: January 26, 2018, 12:15:25 AM
Be safe out there!

- http://tass.com/society/976192
- https://motherboard.vice.com/en_us/article/ne4pvg/police-in-ottawa-canada-charged-a-teen-with-armed-bitcoin-robbery-are-hunting-two-suspects
- https://btcmanager.com/russian-couple-robbed-100000-worth-bitcoin-thailand
- https://www.irishtimes.com/business/technology/boasting-about-bitcoin-profits-godsend-for-cybercriminals-1.3382168
17  Alternate cryptocurrencies / Mining (Altcoins) / Re: What alternatives is there to Bitmain? on: January 25, 2018, 11:38:59 PM
Bitcoin (SHA-256) ASICs sold to miners:

- Avalon (by Canaan, China)
- DragonMint (by Halong, China)
- eBit (by ebang, China)
- antminer (by bitmain, China)

Bitcoin (SHA-256) ASICs produced for (internal) corporate use exclusively or primarily:

- GMO, Japan https://mining.gmo.jp
- Cryptotech AS, Norway https://Cryptotech.no

I don't know where/how/what BitFury sources their Bitcoin (SHA-256) ASIC mining hardware.

- https://www.reddit.com/r/BitcoinMining/comments/7k69go/why_arent_other_companies_releasing_asic/dt8v24a
18  Bitcoin / Mining speculation / Re: Intro: U.S.-based ASIC design group w/ patent on reducing electrical consumption on: December 08, 2017, 10:18:17 AM
Video with more on the technology and background on the team:

- https://www.youtube.com/watch?v=C75VvJ980Ko&t=746

Transcript:

Tom: "I just want to share a little bit of the excitement we have around using Unipolar technology to solve in Bitcoin minng."

"We started work on Unipolar to see if we could come up with a way of using just N-Channel transistors instead of both N-Channel and P-Channel as normally what is used in CMOS."

"So I came up with a circuit.  We started simulating that circuit in SPICE with a variety of technologies. We wanted to see if we could generate the benefits of using just one kind of transistor.  After we simulated it we made several observations about our results.  The first was that fewer transistors were required, particularly for complex gates.  So that meant that the area could be reduced a little bit because we don't need such a large area when there are fewer transisters.  Then we noticed with a smaller area the metal line links would be reduced.  Now metal lines are currently, in state-of-the-art technologies, the biggest factor for delay.  And [a smaller area] can speed things up quite a bit. Further it reduces the amount of power because each line is shorter and needs less charge to charge it up or to discharge."  

"So there's a reduced load on each signal.  We noticed that with transistors you don't have to go to both the P and N transisters you can go with just one type of transistor, the N-Channel. So that cuts the load in half. So that's a very significant reduced loading on every signal.  We continued doing simulations and found that there was a reduced voltage swing retired.  With CMOS you have to go rail-to-rail.  With Unipolar you have to go over the threshold a little bit and back under the threshold a little bit. So all you need is a design margin around the thresholdd.   Further we noticed, when we started putting this together in a whole system, that the clock frequency, for an apples-to-apples comparison of the circuits, can be increased by at least 10X."

"Then we looked at how much power, if you roll all these factors together, how much power we can have.  One other thing we noticed is that a lot of the circuitry can be eliminted.  We don't need all of the gates you would ordinarily need for CMOS and circuitry.  We can get by with about 70% less.  So we only need about 30% of the circuitry.  So with 30% of the circuitry, reduced metal lines, reduced loading -- we come up, generally speaking, expecting 20% of the power that would typically be required for Bitcoin Mining.  Now in Bitcoin Mining one of the biggest issues is how much power it takes to do any given hash and this is going to cut that power by over 80%."

Erik: "We are currently planning to build the world's largest Bitcoin mining facility in Norway.  This is a 150 megawatt facility, which is an enormous amount of energy.  The electricity is already installed in the building, ready to plug in our miners once they are operational. Since our miners are 80% more power efficieant, it means that in our single facility we will be mining Bitcoins equivalent to a 750 megawatt facility, which gives us a tremendous competitive advantage just in energy savings."

"This is why we can offer you a token with the hash power that we are offering at such a low price, with no strings attached.  This is what you pay, no maintenance fees, and no extra or hidden costs."

Post on /r/BitcoinMining:

- https://www.reddit.com/r/BitcoinMining/comments/7idxqc
19  Economy / Trading Discussion / Re: Tips for local transactions on: December 08, 2017, 09:58:08 AM
It's not just thugs in a dark alley that local traders need to worry about, they also now have to worry about thugs with badges who will throw traders in a cage against their will -- all for simply doing a person-to-person trade!

"Man To Serve Year In Jail For Unlicensed Bitcoin Operation"

- https://detroit.cbslocal.com/2017/12/05/unlicensed-bitcoin-operation/

"Bitcoin Case at Kenya’s Milimani Law Courts Sets Precedence"

- http://kenyanwallstreet.com/bitcoin-case-kenyas-milimani-law-courts-sets-precedence

[Local traders sold bitcoin to a thief who paid with stolen bank funds.  Police arrest the Bitcoin sellers.]

20  Bitcoin / Mining speculation / Intro: U.S.-based ASIC design group w/ patent on reducing electrical consumption on: December 07, 2017, 06:54:22 PM
3B Technologies (St. Louis Park, Minnesota, US) is a team building ASICs using their patented technology that allows hashing to occur with less electrical consumption. Their first ASIC will be SHA-256 (for Cryptotech), with plans to enter X-11, Scrypt and perhaps other mining algos at a later time.

Quote
Cryptotech’s novel unipolar logic only utilizes one type of transistor – either NMOS or PMOS only.

In the case of silicon circuits, NMOS only is chosen for its much higher mobility compared to PMOS.

Manufacturing costs are lower since the fabrication is simplified (no need for doping of PMOS transistors).

- Technology: http://www.cryptotech.no/elements/pages/our-stores/
- Team: http://www.cryptotech.no/elements/pages/about/

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