Definitely depends on what you classify as illegal and how you count it. For example, if I count FTX ($9bn), UST ($18bn), and LUNA ($40bn) I'm already at 5% of the crypto market cap.
This is not what money laundering means. The origin of money that was deposited to FTX and Luna was not criminal original. There was nothing to launder here, as the source of funds was clean and proper.