Cash is more anonymous. Computers always leave traces.
I agree, computers will too much trace now days. The best anonymous payment method will always be cash .
I don't see the logic behind that "Cash is more anonymous" , when you have to physically make an exchange when dealing with cash.
And the traces bitcoin leaves can be made in such a way that it's extremely hard to trace, if not impossible.
It's more easily to obtain cash anonymously than bitcoin. If you try to buy bitcoin now days you need a bank account, passport cop, ID copy, mobile phone verification etc.
This is like saying you need to go to bank and set up an account to buy fiat, which makes no sence as there are always options to purchase anonymously (more or less)
btw there are exchanges that don't require identification still, the first one that comes to my mind is btc-e.
I absolutely have no way to trace where the 20$ in my wallet came from.
However, I can trace a satoshi all the way back to its generation.
1. There is a serial number on it, so i guess it's possible
2. You can trace that satoshi, but you can't prove ownership at each address in that timeframe, meaning that you cant prove anything really.