The whole market was up 25-30% (Nasdaq). Now, as a trader, you know that there are companies that follow the market return, or accentuate it (from both directions).
TSLA being a tech company meant that you got better returns (50%) which are not too far from the Nasdaq returns. Apple returns were even crazier for a company its size: +100%!
tl;dr: We are in a bull-market.