I don't understand why you got out of cryptocurrency, did you have a loss? If so, maybe you are not well informed about cryptocurrency and in trading, not only buying and investing, but also looking at the situation.
Maybe he got lost in trading or crypto and it is hard for him to recover his loss. I think that will be up to him, and we can not force him to stay at the crypto if he does not feel comfortable. He can break for a while from crypto to think what next he should do. I hope that he can find the other way to help him make money and get a better life in the future.