bitcoin provides an opportunity to double money if they dare to invest in bitcoin of course they will profit, but many people do not know bitcoin and they assume that bitcoin is deceiving so that hatred arises in their souls.
Wait for a second... Are you talking about Ponzi schemes that use bitcoin and pays you daily, weekly or monthly rate to double your money?
Dude bitcoin's a crypto that you can buy with fiat there's no guarantee that you'll double your money if you invest in bitcoin.Maybe that's why they hate it: that there is no guarantee that you'll double your money?
Because they will be unemployed
If seriously, no one should be afraid of becoming unemployed these days. Many professions disappear, but what's important is that new occupations opening up all the time. Learn a new profession and be paid in BTC for your work. Problem solved.