Earlier quoted context omitted.
I doubt your claim about stablecoins like Tether will age very well.
The problem with his argument about stablecoins is he didn't actually mention Tether, he just said whatever isn't failing. So basically after Tether fails the goal posts are moved and now all the stablecoins that haven't failed yet are held up as an example of success. Speaking of Tether, it's lost 25% of its market cap since May. https://coinmarketcap.com/currencies/tether/
It’s a stablecoin, so market cap is simply the amount printed.