My best guess is that the "store-of-value that can't be manipulated by banks" is effectively over. Big banks it seems will take over the trading volume of the big crypto coins and develop their own exchanges.
I see no reason to consider that, though. You'd have to say that, not only the US dollar, but every paper currency is crashing, along with gold. That seems quite a stretch.
No. Crypto's a bubble. This isn't fiat currencies sliding.