Some people thinks of racers as madmen since they are putting their lives in danger. No matter how big the prize is, it is not enough for the life. Our life is only one and we can't toy with it. Once, we lose it then there will be no second chance.
Buy a car with your money and compete in the race. Try to get ahead of the rest as that is where the big money is. Grab some coins while you are on the road as that will add to your money. You can use the money to buy a better car or use it to upgrade your car. Either way, you are investing on your car and you will see the benefit soon.