I personally believe that Bitcoin now is reaching a stage where more and more lay people are interested in earning it and also holding it like an investment, as they would hold metals and bullion. I think it is here to stay for a few generations at least.
It seems that it might be increasing in price. Keeping Bitcoin as a investment might not be a good idea, though holding at least a single Bitcoin could be a wise choice.
If nobody would invest in it and we all would just buy 1BTC and held it there, it would die the next second. In order to increase the price, we need to use it. We have to show that we're interested in it, and the price will increase. Investing in anything can be a bad idea, not just Bitcoin. It's all about the luck you've got. You can turn your small investment into hundreds of thousands if that's what you deserved.
Everywhere risk is there. Something without risk won't be much effective as well people won't have a good response towards it. But depending upon the risk involved users get good earning which sustain. Also the digitalized way of investment makes it easier to access on the move.
To say the truth, I don't see a high risk on BTCs. The coin is going very well since some years ago and won't be now it will "die" or lose all its value. The real risk starts when you try to invest your Bitcoins in unknown sites on the internet. But if you just keep your coins safe on the wallet, no problem, I would say 99% chance of certain safe profit.
I think that if there were an attempted world wide ban on bitcoin, then the value of bitcoin would increase....much like the affect banning alcohol had in the prohibition days in the United States. The government cannot stop bitcoin as long as there are those willing to use it as a means of exchange. It's way too hard to carry a significant amount of cash around for bitcoin not to be considered as a convenient alternative delivery system.