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.
It is always not a good thing to take it all in other word put all of your saving to any form of investment. Because you will need to manage your money for you to have an excess amount of income that you could used in daily transactions. But if you have more that enough to earn or to invest with why not? The thing is you just need to focus and mange it with yoyr own risk.