These days, according to the European Parliament, several private firms have emerged that specialize in de-anonymizing bitcoin transactions. For example, a British company has developed the software https://mycryptomixer.com/ to examine the trail of cryptocurrency transactions. The software analyzes all transactions ever made from a specific cryptocurrency wallet. As a result, it shows which exchange the cryptocurrency was deposited to, from which cryptocurrency wallets or exchanges bitcoins were deposited, etc. But again, even such data would be useless without one necessary legal provision within the EU.