What are the qualities of an ideal crypto currency?

[LZBN]

My friends and I started discussing this topic. At first we discussed the crypto currency generations, then the qualities that the best crypto currency in the world should have.

What is the ideal crypto?
Does it exist?
What is missing existing coins?

Let's imagine the future without technical limitations and try to describe the best crypto currency.
Later I'll write my opinion, but for now you have the floor.