Buying the dip aggressively is not bad, but you have to make sure that if you are doing that, it will not stop you from sorting out your daily expenses, which might get you off the game, partially or permanently. Buying the dip aggressively is best done when you win a lottery or when you receive a bonus payment at the place of your work, and you use the money to buy the dip aggressively since the money is not allocated to solve your daily expenses.
You must not win a lottery before you can buy aggressively at the dip, because people that buys at the dip will prepare themselves for it. This is where reserve funds comes in play. When you are DCAing, it's good that you set up a reserve funds to buy at the dip, so that it wouldn't affect you financially, but use the opportunity of the dip to add more bitcoin to your portfolio. When it's bad to buy at the dip is when the investor is a new investor, and he is not DCAing but choose to wait for the dip, when no one knows if the dip will come or not.
However, if you are not prepared for the dip, and you decided to DCA aggressively because you want to buy more bitcoin with funds that is not your discretionary income, you will end up selling your bitcoin when your needs arises putting you at loss, if the price goes dipper and stay for a while. It's good we plan very well, so that we don't be a hindrance to the growth of out bitcoin portfolio through our own actions.