There are a lot of things to be considered first, mate.
It isn't that easy to just jump right into using Bitcoin, just because it is that easy in your point of view.
There are many reasons like:
- People think that it is mainly used by criminals. That was my first thought to be honest after I get a few peeks about the deep web and dark web.
- Volatile price. Nothing more to be explained further than this.
- Regulations