So I agree with what you said, but buying more at this time of uncertainty in the Bitcoin market will be a risky move as the price may further decline in the coming days/weeks.
If you are sure about how good the potential of the bitcoin you are buying is, then you should consider buying it. For most of the time, the market is filled with uncertainty especially about the price trend and if you want to buy then do a DCA because it is the best advice when you want to buy any asset.
DCA can help you maximize your purchase at a different price than your first purchase, so it should be the best thing you should consider if you are concerned that the price drop will continue.