Bitcoin is good investment but I wouldn't suggest to put all your money into it. I wouldn't suggest puting all your money into anything, not just Bitcoins. Every investment is a risk and there is always the danger of losing money so you have to invest with care and you always have to have some back up. Don't ever invest more then you can afford to lose.
I agree. The operative word here is "all"; it would be too risky to do that because that could amount to a loss without a contingency. In the cryptocurrency market, it's better to diversify your holdings instead of sticking with one because changes may be erratic that in the event your only coin plunges, you wouldn't have any other assets to get profit from.