You're describing Visa. They've invented debit cards. The only advantage to cryptocurrency is the concept of decentralized trust. A blockchain only has value i

You're describing Visa. They've invented debit cards. The only advantage to cryptocurrency is the concept of decentralized trust. A blockchain only has value in situations where no central authority can be trusted. If Nano solved every problem on your list the result would be what we already have, but with a distributed network of coin owners in control of it instead of credit card companies. That just doesn't seem like a very compelling benefit [0] As the article says, I'm sure there are enthusiasts who are very interested in the technical problem of creating a global payment network. Unless they can do it for roughly half the cost of what we have now, it doesn't have a lot of practical value. [0] I am aware that there are people who are locked out of financial systems because of corrupt governments, etc. But if 80%+ of the population can use the existing systems, they aren't going to go through the trouble of switching to a new currency for the sake of the 20% that can't. And even if they did, it wouldn't be long before the same corrupt governments found a way to lock certain people out of the new system