In times like that simply sell your portfolios and buy USD tether which usually fluctuates very little then when everything starts going green,you can buy your portfolios back and still make some cool profit.I also lost a lot of money from the dump.Gradually prices are recovering now.
There is no point in doing that anymore we have reached the bottom already, you are only going to lose money if you do that, the maneuver that you are describing should be done before the price crashes or before the crash has reached a considerable size if you did that you could buy all your portfolio for a discount and still have money left over to invest in more coins or to buy something nice.