Things are not looking good and cmc is losing market cap of 100 million everyday. If this continues bitcoin will be back to 1000$ soon, then the real panic will start and people will sell their coins.
What if it reaches to the point of 0.1 or 0.01$? Will you buy it?
What will be future of alts if btc reaches 100$ or 10$? Will they vanish?
BTC will never go down that low, there is simply too much adoption and at certain price buyers will be back.