it's not a secret for everyone on this forum that full-scale regulations will decrease Bitcoin privacy dramatically. Registration and verification of self custodian wallets sound like a bad joke.

Several years ago it was just enough to have several bitcoin wallets and to use a mixer time by time to remain anonymous. Nowadays everything turns upside down. If you registered in any centralized exchanges, you linked your identity with your bitcoin address and probably to your entire financial BTC history.


In this thread, I would like to collect advice and best practices on

1. How to stay anonymous when you buy and sell Bitcoin?
2. How to anonymize Bitcoin if you purchased it from a centralized exchange?


Besides this, I would like to find out what is the best anonymous bitcoin wallet for 2021. Please share your top privacy-protecting bitcoin wallets and highlight the reasons they this or that wallet in your top. 


*Please do not advertise, but be honest about why do you like/dislike a wallet.