You could end up screwing yourself if you are waiting around too much rather than just buying and letting the chips fall where they will, even if you end up having a higher cost per BTC, but if you plan on staying in BTC for 4-10 years or more than it may end up doing you better to get your mindset correct in terms of buying BTC ongoingly and persistently until you reach a certain stash level..
I'll just short. This is something that some people have not actually felt, especially those who have just invested, but if they have already experienced take profit from BTC investment, for example as you stated above and the duration, perhaps their expectations will also be very different. They will always want to continue to increase their ownership.