It is true that, nowadays, you can earn money by trading some bitcoin. However, by its nature, bitcoin is not something like that at all. Satoshi Nakamoto, its creator, has invented the system of block-chain as a way to make it possible a peer-to-peer payment system on the Internet without third-party organizations. Thus, for bitcoin to be a pioneer of a brand-new social model or to be something revolutionary, we should SEPARATELY consider bitcoin (and other virtual "currency") and currencies issued by nations.
Bitcoin is not a way to make money. Bitcoin is just a service that people believe in it and they like to use it that define it's value. I don't know if I said it right. But bitcoin is just a good thing now it started it all. It's not really the way but it's the payment of the thing we do. It's called bounty. Lots of ICO's comes out and brings the thing called bounty and airdrop. In that thing you earn something as payment exchange it to eth or btc and then dollars. Bitcoin can be consider as a way of living if you know how to use it.