We need money because more than half of the population on the planet live without electricity or mobile, they don't have access to any electrical gadget nor education.
If cryptocurrencies are implemented they will be casted out of the situation and the daily things won't be able to function well there will be Chaos everywhere and no one would be able to control it.
Money is essential until and unless everyone's educated then only we can think of taking such a big step.

Also all other species function well without money because they don't have consciousness and capacity to think like us humans that's a whole different story