Of course you're not wrong that skilled and experienced investors wait to buy bitcoin but mentioned microstrategy here makes your statement deviant a little bit because of microstrategy waits to invest in bitcoin he would have made his recent bitcoin purchase. This actions of course teaches newbies that it doesn't matter what the price of bitcoin is at the moment all you should be fixed on is building your portfolio to a good standard and if that's the goal then DCA is probably the best way to go about it because one must have examined themselves whether they would be able to buy bitcoin weekly or monthly.

Additionally, those who wait to buy bitcoin as you say are experienced people and such experienced people IMO must have reach a decent level of purchase that they now invest based on market trends or must during the bear market, but for a newbie that is still in his accumulation stage it's absolutely not advisable to wait for a good entry price to buy rather one should buy based on their discretionary income and buy as aggressively as they can when the capabilities are there as long as bitcoin is not a ponzi scheme newbies can be focused on building a good portfolio than gains.