it's not just about waiting and anticipating Bitcoin to hit $100k that matters, it's more of buying and building a good portfolio before it even gets to that price that matters the most.
There are plenty of newbie bitcoin investors who are already accumulating bitcoin in the past recent years who are ONLY able to buy so much bitcoin per week, and so they will still be accumulating bitcoin once bitcoin reaches $100k and beyond.
There will also be plenty of brand new entrants to bitcoin who will be accumulating bitcoin at $100k and beyond, so there will be plenty of folks who had not been able to accumulate enough or close to enough bitcoin in the sub-$100k prices.
Perhaps thinking about accumulating as many BTC as you can in sub-$100k prices, but don't be deterred from ongoingly accumulating BTC whether BTC prices are even supra-$100k, especially if you are still in your BTC accumulation stages.
Definitely, new investors will keep entering at any price at all because it may be at that particular time they got the got the confidence to invest because there are a lot of people that is still being doubtful about the price of Bitcoin like they are scared if the price of Bitcoin can still skyrocket again more especially now that the price hasn't had much increase in price so some people will be monitoring the activities of Bitcoin price so when it eventually increases or reaches a new ATH, they will want to come in at that time with the beliefs that it will keep skyrocketing but it will be lack of experience for someone to monitor the price of Bitcoin before they invest.
Newbies will continue to come in to invest at any price point maybe that was the time they got the conviction to invest so it's no big deal, the most important thing is too accumulate as much as they can whenever they find it convenient to invest whether it reaches $100k or not. Majority of people are still in the accumulating stages of their investment so even when the price hits $100k there will still be accumulators.