I think Bitcoin's long term sweet spot is as a store of value (tho volatile) with its own payment rails acting as sovereign optionality if/when no other money can be transacted. But this property fades in the absence of self custody. I don't think it is well positioned for (nor tracking toward) functioning as everyday currency for commerce. It's best chance to continue thriving in my view is by floating alongside a fiat or gold standard, not by becoming the centerpiece of a new standard.