Everyone should use a bitcoin tumbler.
Bitcoin is not really anonymous, but rather pseudonymous, which means as long as there is no link from your wallet to your name no one can identify you.
But usually it is linked somehow and if you dont want other people to know your bitcoin spending and usage patterns you should seriously consider using a bitcoin tumbler from time to time.
No matter if you are using dark web marketplaces to buy drugs on the deep web or if you are just a regular bitcoin user looking for some privacy.
This site is dedicated to give the best possible information about different bitcoin mixers that provide best privacy and are easy to use.
There are many tumblers on the internet, like bigcoin fog or helix. But there are hude differences between them, not all are safe or even provide some real tumbling.
So before you use a bitcoin mixer make sure to inform yourself about possible options.