http://whirtorrgetftvz4g466sjqkegtyi35bjl4bvotfkfossunf5my4x6ad.onion
This makes it difficult to trace the original transactions, as the funds have been mixed with the funds of many other people. For example, imagine that Alice wants to send 1 Bitcoin to Bob. If Alice sends the Bitcoin directly from her wallet to Bob's wallet, the transaction will be recorded on the blockchain, which is a public ledger of all Bitcoin transactions.