My plan for the last couple weeks is to put $100 in at the start of every week. Hopefully can keep slowly accumulating this way. Obviously would take forever to accumulate entire coins, but hey, gotta start somewhere!
If Bitcoin becomes ultimately successful and globally adopted as a currency/SoV, it wouldn't matter in the end if you'd have one full Bitcoin or not, as chances are, things are going to be priced at lower denominations(bits, sats).
That's a decent strategy though, dollar cost averaging mostly works well regardless if it's a bear/bull market, as long as you stay consistent.