Probably not, but we should probably not compare a total (potentially across years) with something that is measured yearly like GDP, kind of misleading.

No. Just point out as others have that $15 billion vs GDP isn't a likes comparison.

I think they mean the bulk of the sum came from the rise of BTC, moreso than the scam. Like a purse snatcher steals a total of $200 and buys lottery tickets making their proceeds worth $40k.

No, isn't it more likely about them earning money quicker than they are able to launder it?