Using cryptocurrency in our daily lives do really benefit us,
Think twice before using crypto payment on your daily basis with the transaction fees for every purchase you make, that would be fun 
. I have an alternative for daily transactions without any transaction fees. but i am not that sure if every cryptocurrency will work together just to make the world economy better becauseevery cryptocurrency has their own use on how they were developed by it's own creator,
The world thrives on competition and no country will work towards making the other country better.People are creating their coin for the purpose of people investing in them. They want to popularize their idea of a coin, and despite the cause of the coin, people want to earn money.
If the purpose is to create coins for the sake of creating one then it will not last that long, we have seen many projects and coins coming and going in the past ten years and i believe this space does have the most number of failed projects in a very short period of time