Waiting for the BTCprice to fall to invest isn't bad, it's good to buy when it's cheap, but BTC keeps rising, Can you imagine it reaching $200k? I know it's a long way off, but BTC always surprises, I recommend buying gradually, using the DCA method, regardless of the price, but rather consistently.
Waiting for dip explicitly before buying is bad for someone still very early into his accumulation journey since he doesn't have a decent portfolio, he should show more dedication and seriousness by purchasing consistently, with commitment and even aggressively as is within his means. You can save funds separately to buy the dip when it presents itself and it shouldn't prevent your regular buys.
Just imagine that bear season is next year or more, the investor relaxes and waits for whenever bear season comes by before buying Bitcoin while he has discretionary income. He would end up wasting a lot of time that he would've used to accumulate some good stashes of Bitcoin for himself and most times those wait times brings about negative energies and perceptions which might see the person end up not even investing at all, then when BTC gets very expensive, he starts regretting that he missed out because of procrastination.