> All of those issues will eventually be solved.
When does "eventually" arrive? For 12 years I've been hearing that all of the problems of cryptocurrency will be solved very soon. But merchant adoption peaked years ago and has notably declined. Most of the problems are still problems. At this point, I'm pretty sure "eventually" means what I mean by "soon" as a teen when my parents asked me to clean my room. That is, "not now and I'd like to keep ignoring the topic please".
You are taking a look at the start of the speedrun and claiming that it's already over. All of those issues will eventually be solved.
>Plus no way to expand or contract the supply
This is simply not true. It is entirely possible to make it possible to mint new coins. You can burn coins by buying them back and sending them to a wallet owned by no one.