You shold know and understand that it is very risky way of investing. But if you are ready to loose everething you could make good profit with crypto which did you mention.
It is true because it has a high risk but if the price goes up you will have a high risk to get rich.
There is no risk when the prices go up, rather that is a chance of getting rich and if you are hooding bitcoin den its prices are going up, you should sell off some portion to enjoy the profit. As far as investing all savings is concerned, if you are investing into altcoins or gold, then there is a risk but if the coin is bitcoin, you should not take any stress. The more you invest here the more chances you have of getting rich.
There are two ways of thinking here. One is you dont need to invest all your income in bitcoins. Reason is, you cant put all your eggs in one basket. It may be drowned if you come across a loss. So only invest that much amount that is enough for you to loss, in the worst situation. Second way is, you have invest some for the growing of income and some for the emergency cases.