You know, you can't mine Bitcoin today. All the hashrate originates from 2-3 factories. If they want to steal they steal. Add to that, that Bitcoin is not anonymous-private and you get the picture: Why use Bitcoin instead of fiat?
But maybe John got it right. Since the algo is not heavy on memory, someone will program a FPGA for this and screw us. So why all of us have the chance to do it?