So what will the argument be when this market is regulated? Gary Gensler is obviously a fan of Bitcoin. He considers other digital assets in a different light, and seems to consider many of them to be securities. What happens when crypto exchanges are regulated and the level of manipulation is much harder, similar to traditional financial markets? The 21 million cap on Bitcoin is going to look more attractive then, I think, at least to those who aren't considering that now. Plenty of folks already consider the 21 million cap on Bitcoin very attractive, and I think this will only increase over time.
Also the other comments that I see arguing how Bitcoin could be changed tells me that those people have not followed the history of Bitcoin very closely. It seems one of Bitcoin's main goals over the past 10 years is ossification and hardening of the system, i.e. being very strict and careful about changes. This seems built into the ethos of the system. The Bitcoin Cash fork is an example of this. Bitcoin Core refused to change the block size and that led to a fork which has not done well in terms of price in comparison to Bitcoin. One could say that so far the Bitcoin Cash fork has failed in comparison.