The problem is that if Lazarus dumps his coins on a mixer/service and later you use that mixer, you'll end up with one of those coins. Then you deposit on Coinbase or Binance and they block your account.
If Lazarus sends their coins to any mixer, consider it dead, because they themselves may not be attacking it, but you can bet that all governments, regulatory entities, businesses, and vignettes like ZachXBT will be coming after them.
This has happened too many times.
Fortunately, there are plenty of mixers on the
darknet which they often use, so these will take the burnt of law enforcement first.