Ask HN: How is massive cryptocurrency used in the non-virtual world?

If I was a hacker and received a 10M€ ransom, how would I go to turn it into tangible assets (from buying a house to everyday expenses)?

I can understand that occasional small amounts converted from crypto currency to Euros, done relatively smoothly can go under the radar screen of authorities. But a house is 800k€ and the regulations (at least in France) are strict about proving the source of the money used for such transactions.

If I wanted to live from that 20M€, I would need to do regular € withdrawals from the crypto wallet which may be an issue mid term.