I guess you can say that the saying "Money makes the world go round" still holds true even in the crypto scene. Dex is not much used since one, there isn't really a DEX out there that is as well known as the top CEX's we have like Binance. Two, DEX just doesn't offer what CEX can offer. This makes CEX much more appealing, and over time, the market that was supposed to have been gotten by DEX went to CEX.

Sadly, to build a community around a coin, you'd still need staunch supporters right? And most, if not all, would try and use the money to advertise it so in the end, it falls to the factor of, again, the problem of money.