I think Larry's statement was along the lines of "show me the evidence" - to which Mike simply interjected "ETFs". It's not unusual for the regulars to make such brief interjections. Larry didn't hear him clearly, though - likely because of the delay on Mike's side - and asked "what's that?", and it fell apart from there... at least that's my take on what happened.

I certainly don't agree with Mike's "infinite supply" BS... and, I'm not sure I buy that he actually believes it himself. However, either way, I do think he provides a useful proxy on that show for what "smart money" is thinking about bitcoin (i.e. they still have no idea yet what bitcoin really is).