I saw this happen with the early internet, and then later with crypto... It took a long time for the Internet to go from 1) only know to geeks to 2) grifters promising the world to 3) wider acceptance. Maybe this will happen too with crypto, but until it sorts out its grifter problem, it will be always be stuck at stage 2.
Bitcoin is over 10 years old.
The Internet existed before then in various forms, but never as an industry of rich people trying to convince poorer people to invest all their savings in email.
There aren't fewer grifters on the internet. There are just more regular people. And also more grifters, but they can hide in the rest of the noise.
It's going to be the same with cryptocurrency if it sticks around. There will always be people trying to trick less-wise people into giving up their money for nothing.