Did you ever think that monster truck can race?
IN reality, they can’t since they are way too big and a race for them would cause much damage to everything that they ran into. However, this is just a game so you can enjoy racing your monster truck.
Drive as fast as you can and make sure that you got the highest position possible. Try to collect as many coins for added money. You can also make money from crushing those cars and some stunts would also make you money. You can use the money for upgrades or for buying new truck.