“ First of all, Bitcoin and Visa are fundamentally different systems. Bitcoin is a complete, self-contained monetary settlement system; Visa transactions are non-final credit transactions that rely on external underlying settlement rails. Visa relies on ACH, Fedwire, SWIFT, the global correspondent banking system, the Federal Reserve and, of course, the military and diplomatic strength of the U.S. government to ensure all of the above are working smoothly.”

Seems like a fair point, on the other hand bitcoin also relies on relatively reliable internet to be available, publicly accessible worldwide. Which I dont know how long will be around if governments arent functioning...