Finding the right timing to enter the market is quite difficult. If the bear market comes, are you sure your believe in Bitcoin won't waver too? I'm not saying you should fomo and buy right now, but it would wise to have a DCA plan if you want to invest for long-term. While the profits you gain from DCA won't be as big as when you buy at the bottom, it can save some headache IMO. As always, DWYOR.