The problem still remains when you want to aggregate or split funds. Imagine you receive small payments in 100 different addresses and then want to buy a new c

The problem still remains when you want to aggregate or split funds. Imagine you receive small payments in 100 different addresses and then want to buy a new computer. If you create a single transaction with all those addresses as inputs, you make a big trace of a single owner of all of them. I myself not worried about that at all - if you have to hide your stuff from someone, then the problem is not in the hiding techniques, but in the threat. Today the biggest threat is the govt, not some thieves whom you don't want to tell when you go to vacation.