Joby Aviation, Inc. (NYSE:JOBY) was among the stocks Jim Cramer covered on Mad Money as he discussed the wave of IPOs being the market’s possible biggest threat. Starting the lightning round, a caller asked about the stock, and Cramer remarked: The problem with Joby, it’s way too risky. If you’re just starting out, I want you to be in something that could actually go up over time, and you don’t feel like you get disgusted if it drops real quick. That’s what could happen with Joby. Let’s be careful out the ...