Not buying at all is a mistake, in my opinion. Like I said before, every method of buying is good and depend on the individual. Just buy Bitcoin in a way that is convenient for you.
Truly missing the opportunity to buy Bitcoin now would be a very big mistake that someone could seriously regret in some time in the future because just like what happened in years ago about Bitcoin price and getting to these amount now, somany persons regreted to have missed a great opportunity of not buying the Bitcoin then.
However is not too late to accumulate Bitcoin now, perhaps if DCA method is not good enough for your accumulating pattern because of how big your funds is you could as well adjust to the method that's well suitable for you because DCA is not actually a compulsory that everybody most use but instead is just establish to help people especially with the beginners with low capital to manage there risk.
So it doesn't matter using DCA method to accumulate but what matters is how well you are managing your risk and at the same time accumulating in other not be left out.