... ... as is all money in curent circulation in all systems. Not many people clean their money. Not even banks! AFAIK, they just exchange their filthiest for cleaner from other banks. And, no, laundering it is not the same thing.
And, contrary to some common opinions,
money is not the root of all evil. It is the
love thereof that deserves that title. Just like guitars do not hurt peoples' ears/sensibilities, it's what some people do with them that does.
But, alas, until someone comes up with a better medium for an almost-universally recognized value exchange, we're probably gonna be stuck with the sordid matter of coin for quite a while yet.
ETA: I dunno nothing about bitcoin, dogecoin, and such digital currency. Could it be a physically cleaner medium? Maybe. But, the fools and their moneys are ever present.
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