[fanciestManimal]

It depends on where the miners and users go.

I don't know that we can predict today what people in the future will view the incentives to be, but its certainly not impossible that the collective view of the bitcoin community might shift towards some change on that front.

I'm not saying this is the only solution, but if having no block rewards really threatens the existence of bitcoin, and a regular inflation rate were deemed to be the beset way to solve that -- the cap on the number of coins isn't actually immutable. There would be a hard fork in that case, sure, but if that's where the people went, that's where the value would go.

Keep in mind that the miners would have some incentive to back a change to that cap. Every block reward would be extracting value from the non-mining users and distributing it to themselves -- similar to the inflation tax we face with normal currencies. It's not inconceivable that they could drag the user base along with if it was seen as existential. A 2% inflation rate is better than the collapse of something holding a significant fraction of one's wealth.