Is each bitcoin is the same as each other bitcoin? Bitcoin has fungibility problems because technically transactions are traceable. When you make a bitcoin transaction, the coins you spend from your wallet to another wallet have a traceable history back to the point where those coins were mined from the network. If certain services are deemed unfavorable, the history of coins moving through wallets which are associated with unfavorable services could be marked. Therefore in the future some coins could be seen as more valuable because they are clear, meaning they have not been dirtied by touching wallets of unfavorable services. At the current state of the network, bitcoin has fungibility issues, this is a problem which needs to be solved in order to make any bitcoin as valuable as any other bitcoin.