Invest in bitcoin only if you can afford to lose it. There are many ways to invest that are not tied to fiat currencies, such is real estate and stocks. Precious metals too, but it might be too late to buy gold.
Diversify it with bitcoin, but only a small part, and long term.
Well yeah he has some money to invest. And that's what I'd like him to do! Of course not put all his money into it, but just have some. Persuading him it's a good idea is the tricky part.
