The world is what it is, not what we wish it were. Greece is not going to go away just because for the moment it's the sick man of Europe. Somewhere I read that fear of Greece leaving the euro zone is pushing stocks down. Be careful what you wish for. All these vagaries of the market are the reason short-term trading is speculation, as opposed to investment.
I'm on tenterhooks right now, waiting to see if my $29 limit order executes. I'm determined not to cave and buy higher. Either way, I'm okay with it. I'm bullish on Tesla for the long term, but in the short term nothing will surprise me, neither a drop to $20 nor the present price being as low as it ever goes.