I wanna know why someone who doesn't buy drugs or hitmen or sex slaves would ever need bitcoin
There are many reasons a person may want to own bitcoins.
First thing to keep in mind, and this is what trips most people up: Bitcoins are not just a currency. Bitcoin is also a transaction network. And that is a very important thing to keep in mind.
So, that being said, why would you ever need a bitcoin?
-as a store of value to protect against inflation
-as a means to instantly send value to anyone all over the world at any time of the day on any day of the week
-to purchase goods and services
-among many others
As a merchant, you may want to accept bitcoin and take advantage of its superior qualities as a transaction network:
-no more chargebacks
-no transaction fees (credit cards often take 3% or more, plus a $0.10 to $0.15 fee per swipe)
-instantly receive your funds