There are currently 270 million cars in circulation within the US, and 35 million in the UK. Put together, and taking an average car to be £15,000, we are looking at an asset bank of £4.5 trillion pounds, or around the size of the Federal Reserve’s current asset holdings. — Yet it is quite possibly the most under-utilised asset in the entire world. A car has an estimated utility of 5%, given they spend 95% of their time parked.