http://yomixio76f7bnurcrqrhoud5moeu4bvlgukkylixgh2teqllg3mjrqyd.onion/en/blog/post/how-bitcoin-getting-traced
Ordinary online transactions, such as buying products on marketplaces, paying with PayPal, or simply transferring money using a banking app, usually go like this: The buyer instructs a bank, PayPal, or other intermediary to transfer a certain amount to the seller. The intermediary receives the information, stores it, verifies it if necessary, and then fulfills the order.