I'm not an expert on it by any means, but from what I understand just the technology behind the blockchain (essentially how the entire network works) is what is really valuable with Bitcoin. Bitcoin does have some practical uses - I've heard of people transferring money between countries/across the world with little to no fees as an example. It's basically a way to get around banks being difficult/charging ridiculous amounts of money for transfers. The point is not to store all your cash in the form of bitcoin, but rather transfer it to bitcoin when you need to buy something. There's some people who put their savings into bitcoin which is really dumb.