After Laszlo Hanyecz announced his GPU mining discovery on the Bitcointalk forum on May 10, 2010, Satoshi Nakamoto emailed him privately expressing concern. Hanyecz had been the first person to successfully use a GPU (graphics processing unit) to mine Bitcoin, achieving dramatically higher hash rates than CPU mining allowed.
Satoshi wrote to Hanyecz:
A big attraction to new users is that anyone with a computer can generate some free coins. GPUs would prematurely limit the incentive to only those with high-end GPU hardware. It’s inevitable that GPU compute clusters will eventually hog all the generated coins, but I don’t want to hasten that day.
In a separate message, Satoshi was more direct:
Hey, can you go slow with this? […] Look, I don’t care if people hoard the Bitcoin, I don’t care if the wealth is concentrated. But right now, the big attraction is that anybody can download Bitcoin and start mining with their laptop.
Hanyecz later recalled feeling guilty about the impact of his discovery. In a 2019 interview, he said: “I stopped advertising [GPU mining] after that. I was like, ‘Man, I feel like I crapped up your project. Sorry, dude.’ He was concerned that some people might be discouraged because they can’t mine a block with a CPU.”
This exchange is particularly revealing because Satoshi was not opposed to GPU mining on ideological grounds — he explicitly stated he did not care about wealth concentration. His concern was purely strategic: premature GPU adoption would harm early network growth by removing the incentive for ordinary users to participate.
Source: Quotes from Satoshi’s emails as shared by Laszlo Hanyecz in multiple interviews, including with CoinDesk (2025), Bitcoin Magazine, and Cointelegraph. The full private correspondence has not been publicly released.