There are plausible solutions for both of those, or at least a clear direction to look for solutions. Unfortunately, there tends to be a critical mass that decentralized systems need to reach in terms of adoption before they become truly feasible.
Consumers aren't interested in buying a "UWB mesh hub" or some such, which wouldn't appear to do anything but drain batteries. But they might, for example, buy a car stereo or security system that uses a wireless device to deliver specific features, and which also happens to help saturate the city with a p2p mesh network.
Likewise with cryptocurrency, most people are not interested in the hassle for some intangible privacy benefit. But a lot of people might be interested in a crypto video game currency that can be easily traded, even between games. Or perhaps a currency-like mechanism to implement quotas on the mesh.
Consumers aren't interested in buying a "UWB mesh hub" or some such, which wouldn't appear to do anything but drain batteries. But they might, for example, buy a car stereo or security system that uses a wireless device to deliver specific features, and which also happens to help saturate the city with a p2p mesh network.
Likewise with cryptocurrency, most people are not interested in the hassle for some intangible privacy benefit. But a lot of people might be interested in a crypto video game currency that can be easily traded, even between games. Or perhaps a currency-like mechanism to implement quotas on the mesh.