Its digital currency that's tradeable and usable like normal currency, but because it's not recognised as 'legal tender' it doesn't have the rules applied to it like normal currency.
There is no central processing house either (like VISA for example) instead it's done via peer to peer. All transactions are publicly viewable.
Bitcoin is also not owned by anyone. For a company to 'buy out' bitcoin you'd have to buy the currency back off everyone.
How you could make money on it is trading it like any other currency or by 'mining' which is to use your processor power to process transactions (remember no one owns it and it's run on a peer to peer network).