You do have your own plans to succeed with an idea, but if that Idea works and then suddenly don't works, it seems to be quite disappointing because you were going smoothly and then one fine day even gets over, it's shocking. First of all it takes a lot of time to recover from that great shock of losing a job.
Entrepreneurship is another sorts of thing, I think all of us from our childhood would have dreamt to be something so if suddenly you have to change your profession from an Engineer to an entrepreneur it's quite tricky which 0% of guarantee. It's basically on your interest and passion I would say. Doing your own job with independence seems to be very interesting until you implement it, sometimes we do have seen big business getting disrupted and all the money getting wasted.