If your dad's mindset was like that then, there is a good chance that you will persuade him to invest in bitcoin because you can see his interest in that matter. if at that time you already have the ability and deep knowledge when it comes to investment, you and your dad are definitely talking about bitcoin investment. it's just sad but it's not too late, you can still help him if he wants to or you'll be the one to continue doing things he didn't do before.
Yes maybe it is not too late for the father to be influenced and invest in bitcoin if the son will initiate to invest together in bitcoin but the thing is I think it will not be easy because the father will be more hesistant as for a few years he has interest in bitcoin but never actually investing to it proves that the father maybe is too afraid and reluctant to investing in bitciin which is understandable, but yeah it is not bad to try, as long as bitcoin exist there's always a chance and timing to invest into it and actually earn but it will depends on how well the person understood the investment he will enter in, also it will be a good bonding for both parent and children if they have the safe interest as they can help each other, anyway it is not too late if you can try to pursuade your father I'm sure he will be interested again.