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Did you manage to convince your dads or other older people in your family to buy BTC?
The fact that he is into computer in the early years made him decide whether Bitcoin is a good thing to invest with or not. Back in the 90's, it's the stock market that's existing if you want to get some assets. Of course this disregards the precious metals that you can be bought. No other crypto market at that time.
Convincing my parents to invest into Bitcoin might be impossible for me. They don't have any background when it comes to investing in general. They have an "employee" mindset, and didn't try investing at all. I'm not telling them to invest though and will not convince them, but if I will say it to them, they might be skeptical when they heard it or find it confusing for them to learn knowing that they are seniors already.
Maybe that could be the reason too why his father is still eager in bitcoin investment since he was really fond of technology by then. But seeing his already senior, he must be enjoying his retirement instead than to take risk in an investment which has even no guarantees if he will succeed or not later on. But I guess, its still his decision he will follow in the end. However, Im not really into convincing other people to invest in bitcoin not because I want to be greedy, but Im afraid that they will put the blame on me once everything did not work in the end. I prefer to just invest on it secretly, than to share it to others and they might only think that this is just another sort of scam.