A lot has to do with the negativity regarding crypto in mass media. Whether we like it or not, a vast majority of the world still rely heavily on mass media and they eitger do not see or choose to ignore the propaganda the mainstream media is running. They have the power to feed people all sorts of crap and people will gladly gobble it up.

The other issue with cryptocurrency is not a lot of people can understand exactly ehat problem cryptocurrency is solving. This includes both in general and to individual projects. For the in generals, the concept of decentralization or its importance is not obvious to a lot of people, has been brainwashed by governments/central banks etc.

And for the individual part, the different cryptocurrency projects need to make their whitepaper understandable to the general public. Right now most of the whitepapers are basically illegible to most people who are not well educated in either finance or developer Knowledge.