If the banks create a currency, then it will definitely be pre-mined, and will be more centralized than any other crypto out there. this goes against the fundamental nature of cryptos, which is decentralization without a controlling authority. In my opinion, the only thing that could kick out Bitcoin is a crypto with more features and real world applications, ETH or IOTA or even the high-powered retail tokens like NucleusVision and AppCoins.