Every country should ban the crypto scams outright. That way no legitimate retailers support it and they can finally collapse. The only "value" in any of them is finding a bigger sucker to give you real money for your fake "money".
What's interesting to me about crypto currency is the ancillary philosophical discussion of what the necessary and sufficient features of "real money" actually are. Crypto shares a lot of the features we'd normally associate with "real money," people use crypto currencies as "real money," and generally people trust, to some degree, that crypto will have ongoing value (regardless of how misguided we may think that is.)
Does there ever reach a point where those claiming that crypto currency is "not real money" becomes analogous with the man yelling that US currency is somehow "fake" because it isn't backed by gold? The ongoing utility of both "currencies" seem to make both of these positions appear misguided (this coming from a fellow long time crypto-skeptic.)