What do you mean by Revereum? Is this kind of you want to introduce the Project you are developing? you must include complete information at least you put a website link here.
Is it even possible to create such ideal currency?
If it's a global currency I'm sure it will support all assets, but if it's a human-produced global currency, of course there is no strong backup other than traditional banks.
What features should it have?
I think we should not require that it has certain features but what we need is the trust of the users and how the money can actually be used by many people to gain trust.