Another interesting write-up:
https://www.investopedia.com/tech/what-happens-bitcoin-after-21-million-mined/
Considering that Bitcoin is not used for any commercial transactions these days (except for perhaps illicit stuff), it doesn't seem terribly useful and/or practical. Stuff that is not terribly useful tends to be outgrown over the years. Bitcoin has gone from the promise of a digital currency to a storehouse - I think the next digital currency to fix some of these inherent flaws will succeed a bit better.
-Wayne