I had a piece on this for  nostr:npub1t8a7uumfmam38kal4xaakzyjccht4y5jxfs4cmlj0p768pxtwu8skh56yu a few years back -- admittedly not at ATH but still. 

https://bitcoinmagazine.com/culture/dca-effective-going-all-in-on-bitcoin