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.
You actually took the words out of my mouth. I really don't know why anybody would want to invest all they have into a single investment no matter how lucrative it seems. Thumbs up for this advice!
Spreading of investment is a good idea. But for a newbie investor. It is a suicide to invest on different investment because it requires careful study on each investment and focus investment is much compatible. For me. Focusing in one goal or investment will have a lot of chance to earn profit rather than scattered funds.