Can 4sq help track where taxis are? Or even just friends or people on their way to meet you? That'd be killer. Combine that with cryptocoin payments and you'd h

Can 4sq help track where taxis are? Or even just friends or people on their way to meet you? That'd be killer. Combine that with cryptocoin payments and you'd have something that could compete with Uber or some taxi apps. Would be good if it could predict meeting times.. how long for A,B,C to meet with D according to certain parameters (time of day, mode of transport)? .. C has lowest travel time. How long for A to get from point 1 to point 2? What's the probability of A being close to point 3 in the next week according to prior travel? How close? When is best time to go from A to B this week? Also tracking fleets of cars/trucks.. create logistics apps, track travel times, optimal routes.