Is Rivian $RIVN a Good Buy? They make 10,000 cars a month like Tesla $TSLA did in 2015

Dir Flatley bought 40,000 shares of Rivian back last May at $29.31 per share. The CEO Robert Scaringe did the same, buying 41,000 shares at $25.78. Today it closed up 11.8% at $18.15. Rivian has a…