«No, bitcoin isn't going to become a mainstream kind of money. It's too awkward for most people.»

This strikes me as something written by someone who is fundamentally not a problem solver. It's like someone seeing the first cars in the late 19th and early 20th century: awkward, unreliable, etc, and thinking "clearly, cars are NEVER going to become mainstream".

Really? You can't think of any way the technology and tools could improve to make using Bitcoin less awkward?

«Crazy price gyrations are far too wicked for the regular money-using public to tolerate»

Objectively, volatility has significantly decreased over the last 11 years, and will continue to decrease, which is perfectly expected with maturing financial markets.

Cars however did mature. Bitcoin does not. It just forks whenever someone wants to do significant changes. Also at that point no change could ever get it anywhere close to what other projects achieved with similar but better tech. The fundamentals in Bitcoins are de-facto unchangeable and very much outdated.

This statement betrays you have not paid attention to the numerous improvements made to the Bitcoin infrastructure over the last 11 years: wallets, nodes, exchanges, payment processors, vaults, blockchain upgrades, basically all the BIPs https://github.com/bitcoin/bips : segwit, P2SH, lightning, M-of-N keys, deterministic wallets, etc. Using Bitcoin in 2020 is nothing at all like it was in 2009.