No capitalist country lets you buy whatever you want for no reason. You aren't allowed to hoard all the food for example, all basic utilities are regulated. So when the global crypto scam starts to hurt unrelated people by raising energy prices those people will start to complain and create regulations like this to protect themselves. I used the word "scam" since that is how most people see the crypto industry, from their perspective this is a scam that drives up energy prices, there is no point in keeping it legal.