The problem is the stranglehold of control governments have over the financial system. The goal is to track all of the transactions in the system to validate they are legal (no buying drugs, slaves, hiring assassins, dual-use goods, or giving money to people the state has deemed “terrorists”). This control apparatus is vast and a mix of legal and quasi-legal (your Visas and Mastercards of the world have their own bullshit) rules on what is allowed to be transacted or not. So if you’re trying to fund your rebel group, buying chips to put in missiles, or selling illicit substances, you need to get creative to get around all the checking that goes on.

This is why bitcoin exists. It was an attempt to side step all of this, but ultimately has been captured at the exchange points.