Btc is already getting traction in the developing world as a reliable currency and that is likely to grow under de-dollarization.
The entire crypto market is about $1T right now of which btc is about half.
There is so much space for Btc to grow as an option for international settlement, it's already working and trusted as much or more than many sovereign currencies. As it becomes more trusted it will increase in price which will decrease its volatility.
If Btc just takes a little slice of the FX market it's an easy 5-10x. I wouldn't bet everything on it, but it does seem rational to have a corner of your portfolio in it.
The Feds and the bankers hate it because it's a direct threat to their business model. There's no room for a middle man to fugazi in btc.