Money can be laundered in many ways, crypto is one of them but I would be surprised if white hats were behind it. Anything is possible though.

I think crypto is a major threat to whatever they replace FIAT with so they want it gone so they can bring in their CBDC's.

The US government spent 6 trillion in the last year, BTC market cap was just over a trillion at it's peak. They could have easily have been buying in just to sell and crash it later, they have the means to do so. After all it's not their money they're using so they don't care about the cost, they just want BTC dead and gone.

I don't have any crypto at the moment.