TSLA had a rather spectacular 1st day of trading yesterday, and was up a gaudy 21% for a while today. But it closed slightly down from yesterday, so it's "honeymoon" phase may be over already. That's actually good news for the general market, as it indicates speculation isn't yet as ramapnt as it tends to be in real market tops.
Two days trading is hardly conclusive proof, but it is evidence.
This stock only went public in May of this year. The insiders were quite willing to take profits at $8.00 share, which indicates to me that it's not likely to go above that price anytime soon, or to initiate a dividend.
Shorting it when it gets near that price looks like a worthwhile risk at this moment.