Everyone has his/her dislikes you can't force someone into something he/she doesn't like is just simple.
Many of this millionaires feel they already have a lot of money and they envy many of this crypto investors deep down they alswmo want to have this freedom and invest but pride and shame won't let them so they put all effort to tag crypto as illegal currency or make a bad name for it even move to the extend of demanding ban for cryptocurrency. Many of this people wish to be like use
yes, I agree with your opinion, maybe also people who already have a lot of wealth, they are afraid of losing their wealth if they buy bitcoin. now they must be sorry when the price of bitcoin is getting higher and higher in value from year to year. although with bitcoin someone can get a lot of profit, but they prefer gold because they think gold has no risk. maybe they hate bitcoin, because they are afraid that more and more people will get rich like him just by investing in bitcoin.