[as300]

There are ways around this problem. See: https://local bitcoins.com

Doesn't completely de-anonymize you but it does reduce the set of people who have uniquely identifiable information to 1

[ajkdhcb2]

That site requires identification. So the owner of the coins is known by everyone with the dataset (which that will be shared with chain analysis companies), as well as the website owners and the trader you trade with. Pretty big set

[Darvon]

Monero