Its already happen in several weeks ago. Most altcoin price drop the bottom level. Ethereum price untill below $200 and others altcoin cut the price more than 90%. I am keep buying on some good altcoin and right now many of that altcoin already increasing the price
I will do what I am doing today. I know it is crypto market and anything is possible within minutes. Price will go up and down again. There is nothing wrong in it. The price will go with your commitment and consistency. If you stay there and convince others to invest in altcoin, there is no way that the prices will go up. The more the investors the high the price.