Cryptocurrencies are not something that can help people in every single way. If you look at cryptocurrencies, you need to limit your brand. Just think that cryptocurrency is money, and you can use it for transactions like fiat, but when you use it, you're going to have more security than using fiat. Besides that, I'm sure there's nothing cryptocurrencies can help in besides the monetary value. I agree that in the future blockchain will be big, but it will be big solely because of bitcoin that will change the world.
Cryptocurrency could be way how most safety become saving assets and increase value at the future when bitcoin growing to higher price, other time cryptocurrrency become most friendly way how to be faster payment transaction around the world and look easy when we use bitcoin as payment currency.