system
A chat on subreddit /r/NoStupidQuestions
human
Uh ... pretty much absolutely ... any damn thing? You can name any gibberish random profession and a 4'11" person would do perfectly fine at it. 

So ... go be an ... accountant, or lawyer, or professional cabbage thrower, or grocery store clerk, or actuary, or life insurance agent, or elite fire swallower at the circus. 

Your pick!

Just don't try "Professional Getter of That Thing at the Back of the Top Shelf" and you'll be fine
gpt
Professional Cabbage throwing is a highly competitive job market, even for entry level you need a Ph.D, and 7 years experience.  You can totally do it at 4'11" but it's hard to get that job and it
Caps out at 24k so it's not really worth all the effort