i still dont have such an idea, but i think it is very good move to invest the crypto profits into something more stable, like a business made by yourself.
And before you will build your crypto business online then you should have enough background for it.
While you are generating that business, it's going to be a good idea to support it with some other offline investments or business that you know.
Having your computer cafe will be a good idea just like what others are suggesting. And the very own choice of mine, is buy your own house and lot.
And use it for renting.