It should be hold and add more...remember that a big dip is a big opportunity to buy cheap. Those who made Bitcoin purchases when it did 'crashed' to $5,000+ at the height of the Bitcoin vs. BitCoinCash war are now smiling because they already made some good money out of their brave move. This is actually normal in Bitcoin and we should not surprised if one day its value can go down less 20% or even more. We should instead be happy because it can be a good opportunity for others to also get into the Bitcoin party. To hold or not to hold seems to be not the question but this: How much are you holding and buying more when the price will crashed?