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.
DCA is always the best strategy with no hassle, but if the OP is looking for a strategy different from it, then he should wait until the market corrects, as that could happen maybe this year or next year. However, I just hope he won't regret his decision in case it turns out that the market stays bullish for years, but based on its historical trend, it doesn't move like that, so it's still nice to wait for the bear market.