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Re:The first Bitcoin Cash block has been mined by undersuit on Wednesday August 02, 2017 @04:20PM (#14914214)
>As soon as you buy/sell something, someone will know your public key.

So make a new key, and tumble the Bitcoins until you feel safe again.

Re:The first Bitcoin Cash block has been mined by jhasse on Thursday August 03, 2017 @05:12AM (#14918066)
Since all transactions are public, he can easily follow the tracks to your new public key.
Re:The first Bitcoin Cash block has been mined by undersuit on Thursday August 03, 2017 @03:49PM (#14923133)
Tumbling is supposed to make tracking non-trivial. Anyways you can always convent to another coin, especially one with more anonymity, and then back to Bitcoin.

EDIT https://news.ycombinator.com/item?id=14918545 This just started getting popular if you want to talk more about tumbling.