The smart investors won't always be blindly buying bitcoin in any rate. Although it's deflationary coin, and has big potential to increase. The lower you buy, the more profit you get. You can DCA bitcoin, but still use your logic.
Delaying the decision is not always having bad meaning in investing.
Buying at any rate is not bad expecially for investors who have in mind to hodl bitcoin from now till the next 5-10 years. For one who wants to invest for a short time I think it wot be bad if one first consider the rate of bitcoin. Those who are in for longterm investment, for sure they can always buy a new rate.
Anyone who is not ready to go into long-term, I don't think this is the best time to rush into the market because it is hard at this point to predict where the market is heading to.