Continued: As a though experiment: lets say 100% of crypto traders owe 1/3 of their gains (obviously not real). There is nowhere close to enough USD liquidity to handle a sell like that and it would liquidate everyone and still leave them unable to pay their USD tax bill.

The apparent USD liquidity is mostly actually Tether liquidity. There is not actual USD liquidity – nobody is buying huge amounts of BTC who doesn't already have it – so we don't even have pricing data on what the USD price is, all that data has been corrupted by systemic exposure to Tether.

Obviously the thought experiment is totally absurd but it raises questions like, what exactly is the tipping point and how much liquidity is there actually?