What you're describing is a made up fiat currency with the same name, not actual Bitcoin. Bitcoin isn't real unless it exists according to the Bitcoin blockchai

What you're describing is a made up fiat currency with the same name, not actual Bitcoin. Bitcoin isn't real unless it exists according to the Bitcoin blockchain. A bank can't create Bitcoin anymore than I can create dollars. I can create something that I say is dollars, but when I try to use it as dollars no one will accept it.