I think we should change 'USD' to 'market caps USD' in this context. So 17 billion MCUSD were recently lost, as there certainly were never more than a tiny fraction of real dollars involved.
The USDT report does nothing to clear up any doubts prior to the period that law firm sniffed around and that prior period is the one everyone wants to know more about. They could've immediately moved all that money back out after moving it in. I personally think it'll all be fine but the question marks will still be dug up every now and then.
And it was never going to turn the market around. It's locked into whatever trajectory it's heading along immune to news.
I think only when there are more applications of bitcoin will turn the price around.