Having a service which would give you enough coins to live on would be great.
However suppose the project fails then you need to find a job again. For me it's still to risky to depend solely on bitcoin,
That's true, we can't rely on bitcoin as a way to earn for our daily living, and we never really know til when bitcoin will be alive, and if something happen to bitcoin and we are all in, then it would be harder to find a job again, except if you are into business and you are the boss..
Well if you have a service which is successful and if for some reason Bitcoin project fails in future (although, I don't see it happening) then you can simply switch to other payment processors. The key is having a business which is not for bitcoiners only.