You should invest now atleast 50% on alts and 50% on bitcoin. Find those coins right now that is under valued and those coins with a huge upcoming news. That will give you an easy profit.
NO, i am 100% against on this, never go 100% even you will part the money you have.
i am proud to be in a community of bitcoin and i can tell that this currency is growing too much from anyone's expectation. but this is a risk until now. so never go 50/50 in a total of 100%. yes, you can invest and get your money in but please pu some limit like 5-20 percent. that's not bad at all and expect a lot in return if you hit the jackpot. that's all you need to do and never invest the whole you have.