So far I have not heard it. your case is very unique and sounds weird.
why do you lock your assets, everyone wants to enjoy their success.
the best way is to buy real assets, such as land and houses.
also he enjoying his success. but told that he want to lock half of his crypto thats mean 1M$ and others 1M$ he want to spent.Maybe there is some reason.Maybe he is thinking if he locked That money after 5 year it can be 2x or 5x etc.
Which I think would be the right thing for him to do, because if he fails to manage the wealth very well, it would just fly away and would be wondering what he did with 2 million dollars, the best way to successfully manage it is just to lock it, but the aspect of locking, I would really advise him to just use it as investment instead.
Since he has another part that is 1 million dollars, he can still use part of it to reinvest in cryptocurrency, then maybe spend the rest on whatever makes him happy but he needs to still guide the remaining half jealously in case something happens along the line that made him not to manage the other half well, and moreover, he needs to save for the future, if he locks it in the bank, anything could happen to currency and render the money useless, so best bet. Investment all the way.