mix your coins properly before you send the money (which mixer?)
There are plenty of mixers available in the market. Go to the service announcement board and find one. Would recommend using Yomix which I'm using at my sig, not a vouch of course. DYOR.
1) When you mix coins, you may get tainted coins
It's false. I was also in the wrong sense but thanks to LoyceV, after a huge long discussion, I'm now convinced that there's no tainted bitcoin like there's no tainted fiat. You never know whether the fiat you are using is from a terrorist or not. What you know is the fiat is accepted by your govt and that's it.
Of course there are tainted coins. Try spending known Silk Road coins for instance. Also this:
https://cointelegraph.com/news/binance-returns-frozen-btc-after-user-promises-not-to-use-coinjoinMixing doesn't really solve anything since you get doxed to said coins when you do purchases. Honestly this sucks and sounded better on paper.
How do you guys promoting mixer coins spend your BTC? When the taxman asks for origin of the money I guess they wouldn't enjoy you promoted a mixing service, specially if you made money from ChipMixer which was closed, so not sure about that. I would be paranoid for instance, to spend ChipMixer related coins with Bitrefill or even put them on an exchange. And if nothing happens who knows in X years you end up in trouble. This is the problem with BTC, its not fungible. As far as I know, promoting on sig campaigns is legal since it's just marketing, but not sure when the promotion is a mixer. I wonder how people are using their money there. From what I've seen they do nothing with it but hoard it. As far as P2P, I don't trust people in real life, you never know who you are meeting with, and Bisq doesn't solve anything as far as fiat transactions, you are risking it the moment you do a bank wire.