What do you use bitcoin for?

Does everyone here just buy bitcoin in the hope that it increases over time? Or does anyone actually use bitcoin to pay for things or to transfer funds between friends as a form of payment etc?

I don't hold any bitcoin myself but i really like the idea of it i.e. as a decentralised payment system. The problem is, it seems that virtually everyone buys and sells bitcoin, not to use it, but to make a quick or long term buck off it, which leads to a lot of price volatility and defeats the purpose of using it as a currency.