Most likely, it should be expected that the mining of cryptocurrencies with an energy-intensive PoW algorithm will be banned by states. At the G20 summit, states committed to take action to reduce greenhouse gas emissions that affect the current rapid climate change. Of course, in order to show their activity, it is easier to pay attention to the cryptocurrency, in the development of which states, in principle, are not interested. Therefore, every cryptocurrency using PoW needs to be prepared for such a ban. First of all, it concerns bitcoin.