Will people ever be able to live 150-200 years old?

People already live to be over 100. Experiments with starving rats shows that they live about twice as long as non-starving rats. So just a reduced calorie diet could possibly make you live to 150. And, the rats were healthier for the whole time. It's not like you'd have 75 years as an invalid. There is evidence that if you're over 50, going to a reduced calorie diet still gives you most of the effects. But we won't really know for a fact that it works for humans until we've had people try it. It could be another 75 to 150 years before we'll know. According to the book Catch 22, time moves slower if you're bored. Try staring at the ceiling. Exercise seems to increase your life span slightly longer than the time you spend doing it. That sounds like a plan to live forever. Exercise all the time.

I think so, Thats why Im signing up for cryogenics. Ive also heard that its not that far away, maybe 20 to 30 years before something big comes along.

Its plausible but not exactly in the way you think it could happen. Let me explain: If you go in a rocket ship and you go near the speed of light and travel in space for a year and then come back, everyone on earth would have aged far more rapidly than you; the reason is time. When you reach the speed of light, time slows down for you, for you you could live a year in peace then come back to earth and see everyone has aged 20 years. In this way it would be possible to live 150 or upwards years. But would you really want to do that? And also when will we create this type of hyper fast technology?