I don't think anyone really knows for sure what investors value and what would cause investors to "lose interest too". However, we can say with reasonable confidence that what we are doing now isn't working very well on that score.
I'm not even saying I'm all in favor of the OP's idea, my reply was more about how I think it could be done most reasonably if we were to decide to do it, rather than whether it should be done.
My view is that as the cryptocurrency marketplace has matured and competition increased, investors have become more aware of inflation and more discriminating. There is stronger competition out there that has low inflation or no inflation and what you could get away with in 2016 or earlier doesn't really fly any more. I can't prove it certainly, nor do I claim to, but that is my view. Yes, those other factors (adoption, use cases, etc.) all matter too, but all of the competition are pursuing those as well. They're not a differentiator.