Somebody can repeatedly go back in time to fix mistakes as many times?
It depends on the nature of their ability to time travel. If they're reversing time and remain in their own body. As oppose to going through a portal or time machine. Then in believe they could not just live a perfect life, whatever that means, but could gain godlike status. They could become a basketball champion, they'd never miss a shot. They could play the stock market, casinos, they could prevent murders, accidents and warn the world of natural disasters. They write the greatest pop songs, by simply listening to the charts then going back and writing the songs themselve, same for best selling novels, movies, art etc. They could be early supporters of every major successful politician. They could discover major scientific breakthroughs. Etc etc They'd be the richest, most influencial, most powerful and loved individual on the planet. If they played their cards right.