Not saying you're wrong, but this argument is irresolvable unless you can give evidence that either 1) Coinbase/similar are using bank facilities to provide liq

Not saying you're wrong, but this argument is irresolvable unless you can give evidence that either 1) Coinbase/similar are using bank facilities to provide liquidity, and in essence, being the market makers. Or 2) They're using market makers who might bow-out in a similar fashion.