For me, investing all your savings to 3 cryptocurrencies you have mentioned is not really good idea. Why? because you cannot say what will happen the following days or months if the prices will either go up or down. It is very risky and the rates are flactuating. Also, what if something emergency that might happen in few days or months with your own personal life. Be proactive about uncertainties.
I think no, Because when you invest all your funds you take a risk of it. Because you save for your future, but if you invest all maybe their is nothing will left to you but you can earn or get profit. But for now I think don't invest all your funds. Just think for tomorrow. Not all the time you can find money.