Yes investing is worth it, I have invested a lot and gained a lot of profit, but anyways its very low to be honest.
You have invested a lot and gained a lot of profit only because you are expert in that field and have achieved a lot of skills, but dont know the OP will be that much capable to earn from there? I think he must have to think again and again before taking that step.
Newer casinos with less then a few hundred btc invested are your best choice.
At the point is you don't got more then ten you aren't earning much unless there is massive loses to the casino.