You have a point but I think you should also know that the market is not always on ones favor. Now is time to keep accumulating and not to be complain because as Bitcoin is concern it will also increase again and it's just within a short time, which means buy now won't be a bad idea.
However I saw the @51k this morning if am not mistaken but immediately I read your comment I still checked and it was @55,300k and as I said earlier that as it reduces it will still increase, so we shouldn't panic.
As for new investors that doesn't understand about Bitcoin price fluctuation they will likely see of their coins because they don't understand how Bitcoin works but for old investors they might lose little money (either profits or capitals) but they might not sell because they already knows that Bitcoin is always fluctuating.its only investor that doesn't plan on holding for long term that will see their Bitcoin because it dipped to 50k earlier today.