It's true the US has not signed CRS. That's because they already had FATCA, which is many years older than CRS and does the same thing.
Historically, US has been slow to reciprocate under FATCA, i.e. they were receiving but not sharing information. This has been improving over the last few years, with more data flowing out of the US into other countries, primarily EU. So it's quite likely that France has already or will soon know about your account.
It's not too late to do the right thing and declare your income to the tax authority.
If you want to be somewhat within the law, you could relocate to a tax haven, set up tax residence there, establish tax non-residence in France, and take out your profits. But that might not be legally possible either, depending on how long you have been committing potential tax fraud in France.
