Let’s do a quick calculation: when will Bitcoin mining become unprofitable? In 2068, when I turn 100 years old (assuming I live as long as Yang Zhenning), the BTC block reward will be 0.003 BTC. Based on the average inflation rate in the U.S., by then, the price of BTC could reach around $18 million per coin. This means the block reward would be worth about $60,000. However, even with inflation, $60,000 might not be enough to cover electricity costs. So, after 2068, professional miners might exit the mining scene. With the overall network mining difficulty decreasing, mining could shift to personal computers with idle computing power (which was Satoshi Nakamoto’s original vision). The block rewards and transaction fees would still maintain BTC’s robustness.