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.

So this is the whole illicit funds on Bitcoin since it started?
I think there are more than just about 900K illegal Bitcoin it has been a decade since Bitcoin's first appearance and there are so many investment scams that has been around.
And also those illegal bitcoin is already circulating along with the other Bitcoins as well I think the only one who aren't circulating are the lost funds.