I'm mostly use my bitcoins on CS:GO skins... and beting websites since it's so ez and most of my websites accept bitcoin and i can buy fast skins and later bet with them or make giveaways on my Yt channel etc...
Just recently use my btc on mobile topup or load. Its easy and very convenient to use anywhere as long as you have internet connection. Also I use to fund my exchange wallets use for trading. Bitcoin change a a little bit my spending habbit online. Great discovery.