Meaning of top out

(verb) give up one's career just as one becomes very successful; "The financial consultant topped out at age 40 because he was burned out"

provide with a top or finish the top (of a structure); "the towers were topped with conical roofs"

to reach the highest point; attain maximum intensity, activity; "That wild, speculative spirit peaked in 1929"; "Bids for the painting topped out at $50 million"