The answer is Yes， you need to apply that every time you invest in a new phase of revolution. Currently that the state of crypto is so young besides that the crypto space should be far ahead from its current price you dont know what coins are going to boom. But definitely some of them may survive.
The future outlook is very needed when you are investing to something that you are unsure, diversifying is part of strategy where you are placing bets with the selections that you are thinking that things can deliver after, it's best to have another set of assets just in case the first one you have won't deliver according to your plan, you have specific alternatives and still have chances to earned more.