"stablecoins that always match $1 (google USDC), is another lego in the system"

That's not a building block coming out of crypto, it's the application of traditional finance to make it useful. And when you've solved all of the problems, the core technology ends up being pointless. But I'm convinced it will have an effect in the long run, because it will infect traditional banking and eventually in some unforseen way destabilize it. Just because it's so irrationally attractive.