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.