No, not yet. A lot of people are going to panic sell. Then you will have those who will hold on hoping it goes back up at least to what they paid for it. The moment it does they too will sell.

Wait till it stops going down, goes up for a bit, then down again. Only then think about buying.

And for those who are hoping it goes up to at least what you paid for it: Please be aware you ALREADY lost your money. Waiting for it to go back up is poor investment strategy. You don't loose your money when you sell - you loose it instantly. Either you think it's a good buy right now (in which case buy some more, or hold what you have), or you don't think it's a good buy _right_now_, in which case sell and it makes no difference what you paid for it.

Waiting for it to go back to what you paid for it will make you feel better, but in the long run you will loose money that way. Only keep a stock if you think it's a good buy at all times - pay absolutely no attention to what you paid for it. The present, and future is all that matters, the past doesn't.

Yes, if you have spare capital, invest some in Tesla now with the risk of losing most of your investment. Think long term.

Depending on the general mood of the stock market, I think the price will hover around 15~17 until we hear more news in the coming weeks.