Oh, so I don't think he was actually talking about Bitcoin's money supply... most of what he was talking about was saying that the inflation from 2021-2023 was driven by COVID-related supply shocks (meaning supply of real goods & services, not money supply), rather than money printing.

I mostly agree with what he said, though I would quibble with some things.

• For example, he said the the federal reserve doesn't actually create money when it increases bank reserves, because it doesn't go into the economy unless the banks themselves make more loans. But the thing is, increasing bank reserves does increase the banks' ability to make loans, because it loosens the reserve requirement.
• He also seemed to contradict himself when he said that expectations about inflation don't affect demand. But prior to that he said that the Fed manipulates behavior by making announcements to change expectations.

So, I would disagree with his take that the Fed can't really control the money supply. I think it can. But otherwise I agree with his overall assessment that the bigger culprit for 2021-2023 inflation was supply shocks from COVID.

I don't think he actually addressed the Bitcoin fixed supply / deflationary concerns.