I think the short answer to your question is that "mass adoption" will only occur once everyone finds it simple, easy, quick, generally accepted by businesses, and secure. As long as it's "hard" many people won't mess with it. Once DAPPs come into greater use for exchanging cryptos, I think that will help a lot.

Also, there's something like 1,500+ cryptos out there. The question of which ones are going to survive is far from being answered. Of course, there are some obvious ones (top 10 market cap coins) but there will also be a few surprises, I think. The vast majority of these cryptos will fail. It will be ugly. We will have to wait for the smoke to clear from that train-wreck before many people feel it is well enough established to trust.