@op For my part, it is better not to wish to give wisdom to others. Since he has suffered losses once it is better not to advise him a second time. If there is an accident, he will blame you for the rest of his life and he will say that my savings were good.
Finally I would like to say if he wants to buy then definitely recommend investing in Bitcoin. However, hardware wallets and software wallets must store bitcoins. If you keep it for a long period of time, you can definitely reap huge benefits from here.
Saving is safe but investing is the way to grow money. And it is natural to take risks in making these investments. There is nothing wrong with giving someone investment advice. If you advise someone but he fails to invest according to your advice then that is not your fault. For those who don't know about it, we can only help them by informing them about it, but managing money is at their own risk. Investment should always be done after understanding the market, rushing here will never bring benefits.
Giving investment advice to someone is also not a wise thing because even ourselves have no guarantee that our investment will definitely return. So, depending on the object and relationship, giving appropriate advice, IMO.
Furthermore, we need to give fair advice, meaning you need to tell him all the pros and cons of investing in bitcoin, not just say to him about the profits and ignore the risks.
For me, I won't give any advice, if someone wants to invest in bitcoin, the only thing I can do is give them basic knowledge. The rest, all decisions are up to them, I don't want anything to do with their investment, and I don't want to be blamed.