It seems to me that people viewed Tencent's purchase as signifying confidence in Tesla from a legitimate, cash-stacked player.
As a result, it was all aboard the hype-train for retail investors to secure their seat in yet another speculative rocket ship.
Tesla's ability to deliver has been in question for a bit. This cash will be used as fuel to prevent the rocket ship from experiencing a sudden, gravity-induced trajectory into the earth's crust