I wouldnt rank it #1 just because of its value. One thing you should consider too is how much people would accept it. Sure it's worth "4000" ( it's worth more ) but it's not worth 4000 to everyone. For some it could pretty much be worth the same as toilet paper. And for that reason, it cant be the number currency. I'd rank it as one of the worsts for now. But who knows in the future that could change.