Answer Wiki. It's not true that Bitcoin cannot be traced. The entire ledger of transactions is completely public. Every transaction and the size of that transaction is known to everyone. The only "secret" part of Bitcoin is that your Bitcoin address is not publicly associated with any real name.
Can a bitcoin transaction be backtracked?
Being able to backtrack all transactions made with Bitcoin, the authorities do not only capture the individual who happened to make or receive an illegal Bitcoin transaction, but they uncover the whole activity prior to the transaction.
Can web trackers and cookies follow bitcoin transactions?
Steven Goldfeder at Princeton University has been studying how web trackers and cookies can follow Bitcoin transactions and what implications this ability may have on the privacy of cryptocurrency owners. In 2017, his research revealed that at least 53 of 130 dealers that allowed Bitcoin transactions registered payment information leaks.
