It's not only waiting for the dip that makes people miss out on accumulating opportunities, some people feel that they must have excess funds before investing not knowing that it's not very necessary to be very rich before making investment, it's a long-term process so one can start investing as little as they can for a longer period they never can tell how much they'll realise from their little consistent investment in the future.

 While waiting for the dip or waiting to have excess funds before investing the price would've gone higher and the investor would miss the opportunity of owning Bitcoin when it was cheaper, that's why the best time is any time and at any entry. Also, people who think investing on Bitcoin is for the rich, maybe due to it's current value are not aware of the DCA else they've realise how effective it is to all class of investors.