> Unpack this? I had thought that if you sent coins to a fresh wallet ID, it becomes effectively anonymous.
Not really, you can see where the money came from, and assume the same owner (or a relationship between the owners).
To anonymize bitcoins you have to 'mix' them - take X bitcoins from N people, send them to a single address, then send X to new addresses for each of the N people. Because any persons bitcoins might end up going to someone else, you cannot assume it's the same person or a transaction any more.
Not really, you can see where the money came from, and assume the same owner (or a relationship between the owners).
To anonymize bitcoins you have to 'mix' them - take X bitcoins from N people, send them to a single address, then send X to new addresses for each of the N people. Because any persons bitcoins might end up going to someone else, you cannot assume it's the same person or a transaction any more.