Is DCA actually a bad strategy in a bull market?

​I keep hearing the same advice over and over: "Don’t try to time the market, just Dollar Cost Averaging (DCA) every week." ​But honestly, I’m struggling to see how the math makes sense when we’re clearly in an uptrend. If I buy $100 of BTC every Monday while the price is climbing, all I’m doing is constantly raising my average entry price. It feels like I’m "buying the top" every single week.

​If we’re confident the price is going up long-term, wouldn't it have been objectively better to just buy as much as possible at the start? Or at the very least, wait for those 10–15% "flash crashes" to buy instead of buying a green candle just because it’s Monday morning?

​I get that DCA is supposed to reduce risk and "smooth out" volatility, but at what point does it just become a psychological crutch for people who are too scared to pull the trigger? ​Am I missing something here, or is DCA actually a sub-optimal strategy once the bull market is already in full swing?

​Would love to hear how you guys actually justify it when the price is hitting new highs every other day.