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.
Totally agreed with you. Never buy on untrusted altcoins or coins that doesn't have such great potential to it with their history chart also their whitepaper.
For me, i'm looking too Divi, flux, rook as well. They have different purpose with their project of course. But recently i'm more into Divi. Divi is really great community as well they recently just do campaign and donation for people in needs, also Divi accepted as payment for Maple Syrup. I can say there's already a great start for Divi as well. But yeah this is my opinion, hopefully can get more recognition for all of those alts