.. The truth remains that nobody is too strong or too disciplined to not compromise, they just need life to play some tricks one them and this kind of messages popping up all the time.
While it's true that frequent reminder of the fluctuation on bitcoin price has a way of affecting an investors resolve never to sell his asset, it's also neccesary to note that your resolve should be stronger than whatever short term market sentiment you're facing and obviously, if you're not in a time when selling his an option, it's better to avoid being swayed by the direction that bitcoin price is headed.
If you're doing DCA, at every time you're to buy your bitcoin, you will still know the price you're buying it at and so, directly or I directly, you can't do without actually knowing bitcoin price. You can as well position your mind in a manner that price drop can only encourage you to buy at a DIP and not to sell at a loss.