Crypto coming to 401(k) accounts- this is a good thing, right?

Am I wrong in thinking that once Fidelity (and soon others, I'm sure) start offering crypto as an investment option for 401(k), it should be a no-brainer that BTC and ETH will see some significant gains from this? I mean it should open up the world of crypto to a buttload of non-tech-savvy folks who didn't bother to learn how or otherwise wouldn't use or invest in cryptocurrency. And the 401(k) market represents literally trillions of dollars...obviously it can't be that easy, so what am I missing here?