King of what? UK? Saudi Arabia? Etc. Seems boring as hell and you are forced to act a certain way, attend mad boring shyt and eat dinner with mad boring people, it might be cool when you are 70+ though.
I'd rather be one of those 4000 unknown Saudi Arabian princes or Jay-z and Puff who is richer than say a nordic king and free. Besides that, I want to be selfmade. I'd rather be Lonnie Johnson or a "worker" like Kenneth Chenault than the bytch that won the 188 million dollar powerball. Rich and unknown outside of your field is perfect though, like hedge fund dudes.