Bitcoin costs nothing. No one country allow somebody to print money. So today it costs $40.000, tomorrow - $100.000, a week later - zero. And anonymity is a fake - we regularly see how bitcoin owners are caught by police. We just too small fish for them. That`s why i don`t see any problem with KYC - if someone serious decide to catch some gambler - he can do it even without KYC.
I don't perfectly understand where you are coming from or where exactly you are driving to, but let me say that, police catching a bitcoiner has nothing to do with the bitcoiner's identity online, police come face to face with alot of people everyday, and if you give them a reason to catch you, they will, that has nothing to do with whether you submitted your kyc document to any entity who then reported to the police that you are into crypto or a gambler.
Myself is from a country where bitcoin transactions are banned, or were banned, and here I am still doing it, buying and selling bitcoin as it pleased me, the police have never for once catch me or invited me to their station for any questioning or interrogation. I have kyced on a lot of exchanges, in fact, I always verify my identity on every crypto exchange I use, and same also it is with me on gambling casinos, this platforms (the reputable ones) will not just wake up one morning and decide to reveal your personal documents to security agencies except you have committed a crime and an investigation is being carried out.
So, as i said, you is too small fish to catch you. The difference between bitcoin criminals and common criminals is that police has not much experience catching bitcoiners. They can catch such users, but they have to make a serious effort for it. If your transactions about $100-$100.000 - it is just waste of time for police. Exchanges and casinos will share your data as the police asks. It is a huge mistake to believe in anonymity in the internet.