http://idw3655xmgu35thgrslnuwwacoivds4rhqjsrob3y67uf27yommhtyqd.onion/wiki/Anonymity
One person could hold multiple addresses, and in theory, there would be nothing to link those addresses together, or to indicate that the person owned them.So far so good, but there is another side to Bitcoin. Everything that happens in the Bitcoin world is trackable.