He has to look after his health every minute in his life, he has to do lots of sports, to keep his body fit, he has to be very careful with his eyes, hands, etc. Bill is not writing computer programs anymore. The first Windows versions made that much money for him, that he could live as a very wealthy man for hundreds of years. However, they are heroes of today. The time, when Michael is old and unable to race and win anymore, will surely come once. And you never know, there might come someone, who is going to be even better, even faster than him. But Bill is probably going to be the computer superstar for many years after he dies. He developed a whole system for working with computers, and it is surely going to be very hard for the one, who will try to be better than Bill. But any one of them is not going to be forgotten, they are heroes of today, but they are heroes, who are written into the mankind´s history. They are two completely different personalities, but both of them are wealthy men, heroes of the twentieth century.