Binary options I believe to be very risky.
As I understand it, there is no underlying asset and you are basically just placing a bet against a unregulated broker (unless things have changed a lot since I last looked - which was a while ago)
When I looked into doing binary options, I concluded two ways to make money in them (no pun intended)
1 - Be a broker.
2 - Be a affiliate.
They seemed pretty shifty business to me.