Many people are expecting Bitcoin to go down to 10k before they start investing, well not a bad idea but sometimes your expectations might not come true,
although indeed the situation you said could have happened if you look at bitcoin's past behavior, but you are very wise that it is also possible that it will not happen. so it's always driven by time to be able to execute it immediately, always have to take bolder actions to decide immediately, because bitcoin investment is very promising.
People did expect that price will drop like you said and there expectation saw price actually coming low to $17k before this recent drive back up to $24k . There expectation wasn't far from the reality on the history of bitcoin back in 2017 that it had a bull and 2018 it dropped to $3,500 after the bull hype was over. That is same thing expected but for now we can't be sure what way price deciding to go.
yes, indeed the character of bitcoin is that it always repeats the past, so many hope that there will indeed be a possibility that bitcoin will be able to drop below $17K, although it is also very likely that it will not happen.
all can not be known with certainty, so it is very wise to always be able to buy indeed when the price is low enough and does not have to be too low. because you might miss the lowest price it could happen because you expect more than you want.