Just give us something like BTC, without the constant storms brewing. If proper electronic cash can exist then everything will be built around it organically IMO. I still believe the killer app is decentralized money. If the PoW problem could be solved to avoid cartels from being formed then bitcoin would be it but that is not the case thus far as we know.
if it ain't centralised then there'll be power struggles. if it's worth something then greed is gonna descend on it with all the horrible behavior that entails. if there's a way to corrupt it, bend it, or use it for nefarious ends then someone will figure out how.
the ultimate crypto will be pure machine to machine and maybe they'll be kind enough to let us use it too.