Funny thing is, Anthony Gatto was brought up in a circus family and went on to become the world's best technical juggler (based on endurance at high numbers, incredibly difficult technical tricks, and overall consistency rather than just a few one-off record attempts), but eventually got bored of juggling and decided to quit and start a business doing concrete countertop installation.
I did a bunch of juggling in college, and several of my friends went on to do circus arts professionally. Generally they went into more acrobatics oriented arts than juggling; seems like juggling itself is not quite as interesting to audiences as it is to the jugglers.