If you want to invest using the CDA method, it's best to do it during the bearish season, because prices are very low and we can start collecting coins that we consider to have potential, such as bitcoin, ethereum, etc. Because if we buy late, the bearish season has passed, the coin price will become expensive.
Yes, DCA method works best when someone uses it in bearish season, however most investors are in fear during bearish season and that's why they avoid accumulating any coin during that season or wait for highest dips to accumulate some coins.
Bitcoin was at $17k and many people were still fearing that it isn't the right time to accumulate it, those people might still be regretting that why they didn't used DCA to accumulate some Bitcoin at $17k and $25k.
I have personally invested in Bitcoin and some good altcoins in last bear market and I'm thankful for that investment as I have made quite good profits because of it. I often follow DCA method with dip buying strategy and in bear market I accumulate some good amounts of reputable coins.
I do sell some of those for 10% or more profit and hold rest of it for 2-3 years as that's enough time to have 100% to 200% in most cases and if someone can control his/her emotions during that time then that's a lot of profit within a short period.