I think the bigger issue is that Bitcoin has nothing backing it. It's value (and in turn, volatility) is driven by popular demand for the "asset", so even if there is some insane moonshot scenario where we do adopt it into the financial system, there's a very real chance that the price will collapse with little or no chance for recourse. That's the biggest issue, and it's one that's inherent to Bitcoin's nature as a decentralized currency. You'll hear diamond-hands Redditors complain about how Bitcoin "shouldn't be a fiat" and other such yarns of fiction, but the truth is that it doesn't have any desirable qualities that a centralized currency does. There is no bail-out, if Bitcoin fails then no sane person is going to let the global economy fail with it.

Simply put, there's just no path forwards where Bitcoin retains it's value long-term. Other crypto is harder to grok (often intentionally so), but I suspect they'll meet a similar fate once the media attention blows over.