Bitcoin is economics. Proof-of-Work relies on miners investing and competing. Miners that continually invest generally win - and those that do not, die. The st

Bitcoin is economics. Proof-of-Work relies on miners investing and competing. Miners that continually invest generally win - and those that do not, die. The stronger the system, the harder for Bitcoin enemies to subvert/takeover the system. In 2008, miners used CPU's, several years later miners moved to GPU's, several years later miners moved to ASICs, and recently miners moved to data centers.