They are limiting mining of a single coin: Ethereum. Nothing is going to stop mining other coins, which are quite profitable. Also, Ethereum is going through tw

They are limiting mining of a single coin: Ethereum. Nothing is going to stop mining other coins, which are quite profitable. Also, Ethereum is going through two upcoming events which will change the landscape dramatically. July has EIP-1559 which will reduce ETH mining earnings by 30% and the eventual move to proof of stake in late 2021/early 2022. Both of these events will make other non-ETH coins more profitable.