1. Speculative/trading/buying coins hoping to get rich.
2. As a medium of exchange, currency to buy stuff just like you would for money.
3. As a means in itself to make money, i.e mining.
Also why did you get into bitcoin?
1. You were one of the first movers? You thought it was cool, interesting, you were here from the start?
2. Revolutionary ideas that it's going to change the world, banking system, etc.
3. You were just curious and then the more you looked into it, you saw how cool it was and promising(me).
4. Speculation, wanting to get rich.
I think we are into all of these choices but that depends on our own personal desire, wants and needs. In my case I use Bitcoin to buy prepaid loads for my internet connection and I also use it to buy Altcoins to get profit. We all want to get rich but that is not so easy. I came here in this industry because I was interested in Bitcoin and my curiousity brought me here in this great community. This is where I knew more about Bitcoin and other stuffs.