It's not a good idea to give up on a business too early. What those people need to know is that business takes nurturing, a lot of hard work and patience to get it to where you want to take it. If you're impatient, then you probably shouldn't be in the business world. But you should also know when to quit. If after many years of ploughing money into your business and it's still not yielding any dividends, it's time to quit, regroup and re-strategise!