I think developers have to start working on mass adoption of their coins, once they have done that, everything will be much easier. Now the problem is that maybe a 10% know or heard about bitcoin at least once, but probably less than 1% is active in the crypto community learning about it and maybe investing in some cryptocurrency.
That is not a problem that the developers can solve, what are they going to do? Are they going to try to make people adopt cryptocurrencies by force? There is nothing to do, if people want to adopt cryptocurrencies then they will do, and if they do not want to then they won't, we have seen that people that are in difficult circumstances because the governments of their countries have imposed laws and regulations that destroyed the economy have adopted bitcoin out of necessity.