Way cheaper with fewer headaches would be just to travel around Europe and cash out at ATMs while on vacation, still plenty of countries with no KYC under 500-1000 and still enough ATMs
with under 5% fees.
Cheaper if there was no travelling around and "forced vacations"

I think it's sort of hectic trying to cash out close to $300K in that fashion.
Spread it over a few years and it's nothing, we're still talking about Europe and 1k Euros no kyc, you can easily hit 10-15 ATM is a day in most capitals that still have those, and despite being a full continent, places are really close compared to others.
Again, he wants to avoid paying 60k that's above what 90% of the world makes in two years.

There is no capital gains on crypto in Turkiye. Find a way to become a tax resident in Turkiye and cash it all out and then you can move your funds to whatever destination you choose to.
He needs to move that from France to Turkey, the moment he does that, he must declare all his assets. if he doesn't do that, then it's tax evasion, so there is no "legal" way to simply export untaxed wealth out of the country.
I would open a business (outside of France. Perhaps Dubai or something.), use the Bitcoin's as capital along with some other money if you have some, make a product and extract profit from it as the ultimate beneficiary owner.
Again, legally doesn't work, he gets that capital out of the country used to finance a business, the moment he does it's a taxable act since he's loaning fiat value to the company.