I thought the majority of the UTXO set was in individual hands, but even if it was mostly in bitcoin banks, what causes the fork? What kind of bailout are you talking about, a native bailout on a Bitcoin fork? That's just not the real bitcoin and would be rejected by true bitcoiners. You might be able to convince the majority of statists that it's legitimate Bitcoin, but those remaining true to what Bitcoin really means will stay on the real chain and will simply outhodl those who diverge. They may be inconvenienced by suffering a reduction in purchasing power, but as long as a community of real bitcoiners remains intact, it will continue on indefinitely. Sound money is powerful, as is honesty and rationality. That patchy, scrappy community will attract the vast majority of the capital. Short term fluctuations are child's play to them.

The only thing it occurs to me that we'd have to worry about beyond the usual comcerns is the security budget and double spending attacks. 51% attacks cannot do THAT much harm though, thankfully. It just makes final settlement a but more of a wait or require a tiny bit of extra verification, really.

re: bitcoin backed loans discussion imagine you want a house and you take a loan/morgage against your bitcoin. then suits decide to fork. now your collateral is useless and only sane action is to not repay.