Who knows ? We might be going to see that again and again in 2019 also. But, buying at every dips must be a good strategy of trading so that you will never miss out an exact bottom. But, you will be enforced to wait more. When your capital allows, why not you just go for assuming every dip as a bottom ?
How can it be a good strategy? If you buy at what you think a bottom, your bottoms start accumulating and losses multiplying over time. It is like martingale in dice, you double down on your buys to lower your breakeven point and end up broke in the end. If you come to disagree, just think about those who started collecting dips at around 12k in January a year ago, which was thought an ultimate bottom back then. What happened next is history
And it is given to repeat itself