He has just to be careful when storing the coins in order to prevent future issues with hackers and scams.
But before that, he needs to inform his father that investing in bitcoin is not that what he's thinking as if no downfalls will come while waiting for the right time to sell.
Indeed. It has to be a conscious decision. The father has to be aware about every pros and cons of Bitcoin investment. He must understand the fact this market is heavily volatile, therefore the investment can oscillate upside and down for undetermined periods of time, until finally having profit. He has to understand BTC must be stored in self-custody wallets to let him (or his son) under total control of his own funds during all the length the investment is going on. He has to make sure he isn't going to need this retirement money soon for another expenses, because once the money is invested in BTC, he will have to wait patiently for the next bullish season.
That's one thing that's setting me back when I see threads like this and after not reading that there's a consent from the person of their subject. If there's no permission, there's no need to force it.
I agree, I mean putting lets say 10% of your retirement fund on bitcoin and leaving that would be fine, the worst case scenario you will lose all of 10%, which we all know they won't but lets assume the worst. However, if you are going to end up putting all he has, then we are talking about something terrible.
Don't risk that much money for old people, bitcoin is slow in that regard, it may go up quick, but it take years for it to start going up quick, one day it will be 30k and next month it is 80k, but for that to happen we wait 2-3 years, that's why it is not a good idea. Don't put that much stress into people and you will end up with a lot of trouble, I personally would suggest doing something smarter and just get out right on the correct time if possible.
These people are delicate and sensitive people. Even if we say that they're the kindest, it's their money that they have worked for their entire life and they wouldn't just allow that to lose through volatility if they don't understand what they're getting in.
It's better to just let them do whatever they want whether it's another investment or some kind of recreational activity with that money.