What do you want to do when you became 50?

Do you consider 50 YO OLD?! The father of a friend of mine is turning 50 after a few days. He is very happy and has a nice life with a wife and two boys. Maybe 65-70 YO do have problems, but they mainly travel "to see the world" until their days come to an end. If they don't have the resourses well... then it's a different story. Why are most of the people who are over 50 in your country sick? What's the reason? Is there an epidemy or something like that? When I become 50, I'm sure that I'll have the mind of a 18 YO. I know me. And I hope that I won't change much (character, not wisdom). That's what I hope for my 50th year. ;)

i wish at the age of 50,i can got the financial success,then i will quit my job,do the thing i want do.i always dream that one day ican travel around the world,and can publish a novel, i hope i can do it!