It is possible to go down as low as 200$. The possibility exists. If that happens, we should invest our money to it and see it as an opportunity to invest. It would not stay in the dumps forever. Since Ethereum is such good coin. So it will recover and bounce back again from the dumps. Although we can't say for sure that the lowest it can get is 200$. It might get lower. But I hope that it will recover again as soon as possible.