I can’t say exactly how effective Bitcoin is as a money, but it’s being perceived by many as an alternative money and so is worth paying attention to. Money needs to be both a medium of exchange and a storehold of wealth — and the latter is more important. I doubt that any central bank will take it on as a reserve currency. That’s because all of the transactions are public, so there’s no privacy to it, and there’s a risk that in the future the code could be broken to make it less effective through government controls. My personal approach is that I do have some Bitcoin in my portfolio, but not much.