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.
Yes in investment there is always a risk especialy on bitcoin because its price always change. But dont be afraid to take that risk because if you will try to invest i know it is worth it. If putting all your money into bitcoin is a decision you would decide, i guess it is not a good idea if you dont have a source of income through bitcoin or fiat. So before putting up money on investing have an source income like a signature campaign here in forum so can have a back up money for other thing you would like to try on. And have a wallet that suitd your need so taking out money is not a hard part on your side.