No, that's actually a bad analogy he just used. Originally it was, 31 billion zeitcoins(Who can also be divided into 8 decimal places) and 1 BTC.
He's purposely trying to change things to suit his flawed argument, same as when he said that cryptocurrencies don't use much cryptography.
Well, I totally missed that discussion, but yes, 31 billion zeitcoins
available in the open market is much more liquid that 1 BTC. Each having the same 8 decimal points.
1 fish in the market is infinitely more liquid that 0 BTC in the market.
Whether people will but it or not, that is totally different argument.