Ann Wambui lives in a two-story townhouse in Matumbato Estate, Upperhill, Nairobi. It is one of the few residential places in the area that are yet to be drowned by the strong tide of commercial development that has seen bungalows give way to skyscrapers.
Maybe, Ms Wambui and the other tenants have offered the landowner a better deal in monthly rents. After all, Wambui deals in bitcoins, the newest investment craze that is making people millionaires overnight.