I buy bitcoins because it's very confidential , the price is still growing up , and I can get a lot of profit with that currency named Bitcoin .
Also I am very interested in Altcoins ( ETH / ZCASH / DOGECOIN / LITECOIN etc ) . Also I am buying bitcoins because I can mine a lot
I also buy bitcoins because the price goes up. I also use bitcoins for investment. I like bitcoin in that it is not subject to inflation like Fiat