[averynicepen]

For the record, currently recommended best practice is to create a new Bitcoin address for every transaction. Although the ledger is public, using it on a regular basis would mean you have hundreds of addresses per user.

For targeted investigations, blockchain crypto is already being a hugely useful tool for 3 letter agencies. But for dragnet policies of mass de-anonymized transactions, I currently can't think of a way for this to actually work with limited resources.

Currently, anonymization is being defeated at the source by requiring registration with all major crypto exchanges. But once the coins start to circulate like cash, wallet to wallet, you would need to force registration on the wallets (in order to match identity to the addresses) - but there are many options that are either heavily security focused or free and open-source, so it would be difficult to find a single choke point to regulate.

Depends on what the future of crypto wallet adoption looks like, I suppose. Monopolization does tend to happen...