I&#x27;m a big supporter of bitcoin and I have a superficial understanding of how the public ledger works, but why is it not incredibly easy to launder money through bitcoin?  Since the currency is fungible, aren&#x27;t there services that allow you to send bitcoins and it will send move your bitcoin around through many other accounts, including bitcoin from deposits of others? The end result being that the end state of some bitcoin cannot be traced back to the origin. How would someone reasonably trace that with any degree of certainty?