If history holds true, this would be the time to exit your positions in those ... questionable alt coins you might be holding. If they arent rock solid, bail now before you end up in the red. When the bear market truly takes hold, people tend to sell their alts and consolidate into BTC and ETH in search of safety from the drops. Others just sell off and leave the market completely. But you don't want to be bag holding something that never returns.