Yes, waiting for a price drop when buying Bitcoin is not an appropriate strategy for long-term investors. Logically, we should understand that waiting for a price drop is a strategy that is prone to dilemmas. So, rather than worrying and missing out on opportunities, I don't think buying Bitcoin should be fixated on price. Regardless of the current price, it's highly likely that in 10 years, the price will be much higher, and we'll profit. So, why ignore momentum and choose the right price when buying Bitcoin?
There is nothing wrong to wait dips for purchasing bitcoin but experienced investors do it differently than newbies. Newbies wait for lower prices, try to find bottom prices to buy in, while experienced investors can do Dollar Cost Averaging regularly and don't mind about price, or they can wait for price dips of 10%, 20% or 30% and buy without concern about at what prices they make purchases.
They know that price dips are very good for accumulation and if they can hold bitcoin for a long time, profit is very good especially if they buy in dips.