At least 870,000 bitcoins are associated with illegal activities. This is about $ 10 billion.
- Darknet marketplaces - 585,000 BTC.
- Stolen bitcoins - 204,000 BTC.
- Scam project organizers - 98,000 BTC.
- Other illegal activities 3,000 BTC.
https://markets.chainalysis.com/#risk-illicit-placementOne day, all these bitcoins will somehow hit the market.

Anything that has valued in this world will be used for something bad or good thing so its never bothered me at all with that statistic. That was their money and they loved bitcoin because of the anonymous transaction. Mean bitcoin does do their job very well in transaction whether it bad or good. Who cares even a real fiat has being used for illegal thing for ages now so it bring no different at all to me.