#加密圆桌会议要点 But in reality, POW also has significant flaws. For example, for Bitcoin, POW has become a pay-to-play model, which is a profit model that only those who can spend a lot of money will join. In fact, miners have long-term capital expenditures to maximize their own interests. In addition, POW is not environmentally friendly. The profitability of POW depends on the computing power owned (or the advancement of mining machines, etc.).