I could have gotten an even larger profit had I not sold my shares at last minute.

This market resolves YES if TSLA stock is at or over the stated amount in the question. 

Betting closes at 3pm ET, and question is resolved after 4pm ET stock market close. Excellent short-term play, offering quick daily resolutions, and depending on the trading day, easy profits for putting into long-term markets.

This question does not recognize after-hours trading, only the official close price listed on Yahoo! Finance for that day is used for the resolution of this question.

Reference: https://finance.yahoo.com/quote/TSLA/history?p=TSLA