[cactus2093]

Honestly maybe it will fork, and maybe that will be a good change. We don’t exactly know how the dynamics of mining will play out in a post-block reward world, maybe it’s actually better to keep mining at the current block reward size indefinitely rather than decrease all the way to zero. Very slow fixed inflation is not necessarily that different than having a hard cap on supply. Gold is still being mined too.

If it forked in a way that completely defeated the limited supply and led to rapid inflation then it would massively tank in value and miners would lose a lot of money. That’s a pretty good incentive for them not to destroy it.

As far as bitcoin existential threats go, there are many of them - the energy cost, a 51% attack, so much concentration of mining in China, etc. Miners mutually colluding to destroy their own investments is not at the top of my list of worries.