The phrase buy the dip is only a good advice when you apply it properly by buying the very good altcoins whose value is only down because of the bearish market condition. Because it is not all coins that dip that would recover their value.
For example, early this year (when the market was super bullish) almost all the projects released saw good increase in their value. but that doesn't mean it is all of them that were very good projects. After the market dip (correction), most of them never recovered their value. The crypto market is filled with a lot of scrap altcoins and the market way of sheding them off is to dip (correction). So it would be in your best interest to only buy very good coins in the market dip.
Ofcourse, not every coin that dip is worth buying, reason why it is very risky to buy certain project when the market is in bull run for long term purpose, the best time to separate solid project from stictions is during the dip and recovery time, besides this, some project are not quick in recovery like some, so far i can say sol and bnb are among the fastest recovery project i have seen, especially sol, this coin can do well both in bull and bear market.