We as humans always tend to look at what happened in the past and what will happen next. This works sometimes very well. But in this case - crypto is something very, very different, than stocks.
So - while I understand why your father would be sceptic about crypto - he could have made a lot of money over the year(s) since you are active on STEEM(IT).
And with this logic - if he was wrong back then, maybe he is wrong now?
Anyway - always great to read your blogs. They're very authentic.