For speculation? To buy on the dark web? To buy online on sites like purse.io? To send money? To do business? To have your money under your control?
What is/are your purposes when yu buy bitcoin?
Definitely for investment in trading site.
I hate wasting my time to earn free bitcoin from faucet and other site similar to faucet.
So, i buy a small amount of bitcoin and start growing that.
I prefer buy than earn very very very small amount for free.