So for (1), not appealing for anyone currently interested in the one killer app for cryptocurrencies. For (2), I look at it this way: A swimming pool can be 99

So for (1), not appealing for anyone currently interested in the one killer app for cryptocurrencies. For (2), I look at it this way: A swimming pool can be 99% pure water, but if it's 1% poop I don't want to dip my feet in it. As for (3), Visa can do something like 250k transactions per second. The blockchain aspect of this system unnecessarily hobbles it, and it seems like really the blockchain aspect just tacks on a techy buzzword that offers no compelling features that a purely centralized database can't do better.