Bitcoin is electronic money appeared in 2009 developed by Nakamoto Satoshi. WIth blockchain, the
distributed opend account book, it is possible to have deal with no central control and no double payment.
Bitcoin get recognition as digital money globally. FBI put bitcoin seized from ‘Silk Road’ which is cyber
black market at auction, and Japan amend the law of Bitcoin. Bitcoin is mined by mining, and it is
usually worked by ASIC in nowdays. WIth ASIC a few miner got strong mining capablity, and it is
threatening distributed blockchain. In this paper, with analysis of problem of mining bitcoin using ASIC
and with advance of GPU capablity, researchers suggest GPU mining. Also, with comparison of mining
capability between ASIC and GPU, researcher shows that home computer has enough mining capability.
With result of comparison, researchers show that home computer users can participate in mining. As a
result, the size of mining pool become bigger, and possibility of falsification of blockchain become smaller.