The most recent block averaged 60sat/vB, equating to roughly $5.50 for a single input/output transaction. If one were to DCA into self-custody at $100 intervals, they're paying (at least) 5.5% to transaction fees atm.
Tx fees spiked again, it has been low for sometime now, i don't know if it is ordinals or fomo buying that is causing the congestion in the network, but right now tx fee is ~ 80 sats/vbyte as i type this, which is very high. During periods of high tx fee, i don't recommend that people buy through dca, you would be paying too much in fees if you are buying at different intervals, so it is better to buy less frequently and much more in amount for each purchase.