>Once everyone else realizes the superiority of cryptocurrency, they will all want to switch over, and the value of fiat currency will collapse.<p>You really think so? Cryptocurrency requires a massive infrastructure (the internet) and inaccessible physical locations will always have a need for physical cash. It's like saying every country will go digital with money, I don't think that's the case now or in the future. The hand-to-hand gesture is just too fundamental to being human to be circumvented by some clever logic boards.<p>Credit in crypto? I don't mean to come off as rude, but do you understand that proof-of-stake in crypto is an emerging issue, and that proving that you own a particular bitcoin or that you are even the owner/controller of a particular address on the blockchain, is not an easy task. Credit is built on a secondary or even tertiary idea of "how reliable is this individual to eventually bring the balance back to zero or near zero" and cryptocurrencies don't play in this nether-region, because it is already an amazing innovation that we can have a distributed ledger at all.<p>To say that credit is the next logical step in the evolution of crypto... I don't think you have really condensed or absorbed the very paramount differences between normal money and cryptocoin. One is a physical IOU, the other is an indication of where transactions have moved. Cryptocurrency is not fundamentally an IOU any more than a bar of Gold is an IOU. Credit is possible with IOUs, but it is not possible if the boolean value is "yes I have one satoshi of gold" or "no I don't"<p>Thoughts?