You don't have to use crypto. Obviously some people want to be involved in crypto, so why not just respect their right to do with their own time/money what they

You don't have to use crypto. Obviously some people want to be involved in crypto, so why not just respect their right to do with their own time/money what they want. If the environment is your concern, then you should propose application agnostic restrictions on emitting CO2. Not use the environment as an excuse to selectively prohibit an activity you personally dislike.