From Bitcoin University
Video Description
In this video, I discuss the power of dollar cost averaging into Bitcoin, rather than entering via a single purchase.
Dollar cost averaging (DCA) imposes the discipline of buying fewer sats when the fiat price is higher and more sats when the fiat price is lower, thus giving you a lower fiat cost basis.
In addition to dollar cost averaging, it's important to hodl BTC, instead of trading in and out. As Jack Bogle used to say, "time in the market beats timing the market."