How is it possible to value a Bitcoin more than another similar Bitcoin ? They all have been mined at somepoint, they are not like physical money where they can get dirty and suffer from time and exposure to natural elements.
I just don't get it.
Freshly mined coins have no history... If you, for example, peddle dope on a darknet market, you run the risk of selling your stuff to a law enforcement officer during a sting operation.
Now, the law knows that the coins on adress X were used in a dopedeal.
If you send those coins to this guy, he'll send coins that were recently mined to a different address of yours (adress Y). If done over Tor, there is no way law enforcement can ever trace the coins on address Y as belonging to a dope dealer, so the dealer might exchange those coins for cash, or buy goods or services with them without running the risk of being tagged.
Offcourse, there are mixing services that offer the same type of security, and they ask less fees (or you can use a whole range of other tricks to do the same "washing process", all cheaper than the 10% the OP is asking), but in this case you will receive coins that can be traced back to a different (possibly illegal) transaction. Since you have nothing to do with this other (possibly illegal) transaction, it shouldn't worry you. BTC are like cash, the money in your wallet might have been stolen during a bank robbery 10 years ago, maybe the police can trace small ammounts of cocain on them, but you'll never be punished because those coins changed hands thousands of times since they were stolen from a bank. Just make sure that if you stole them yourself, you don't get caught with them
In the end, it doesn't matter... I'm not into illegal stuff, so i couldn't care less if somebody was able to track my coins to my IRL profile...
