Buying during a dip yes is quite strategic but you'll also miss a lot while waiting for a dip.
Everyone should buy according to their financial capabilities, if you don't have much to buy, and decide to wait for a dip is alright, and if you are financially capable to buy at anytime it's still alright.
N/b you cut your coat below your size and not according, if you want to be a success!.
If you are afraid of missing the moment while waiting for the price to drop, then you should use a buying pattern using DCA to have a little adjustment. For long-term investments, it may not affect the purchase pattern because what we expect is a significant increase so that buying at any price can be an option. But if you want to maximize all the possibilities that exist, apply a percentage of purchases where you buy consistently using the DCA pattern and wait for large purchases when there is a decline so that both can be much more optimal as an investment effort that we make.