I will say: "Reaching personal target goals".
This could be the best or one of the best reasons to sell and take profits, and specially if you are a beginner, you can used this strategy or goals at the start and then see how it goes for you. Or let's say your objective is to save like .1 BTC and then you are going to sell if it reaches $100K.
If by chances everything falls into pieces, then you can sell some or all of your Bitcoin and take profits and enjoy, rinse and repeat or make some tweaks.
the only problem with such strategy is when the market showing obvious sign of falling, will you still persists with your initial strategy, it will be hella difficult decision to make, whether to follow strategy or just dump it, because if we missed the opportunity we will be at lost, and if we try to be more flexible enough we definitely gonna go further from the initial plan.
thats the thing with this strategy i've tried many time, for example buying at price of $0.1 im gonna cash it out at $0.25 but alas when it reached $0.2 it falls instead, i would have made good double profit if i just dump it at around $0.2 since usually the sign is kinda obvious but well sticking to strategy definitely some time cost a lot.
There would really be those hesitations since you do know that it might be a trap on which how many times this market did make out such move on the time that it might be looking on dropping
but it did go into the opposite direction.This is why you would really be ending up on having those hesitation on finalizing your plans or putting up your analysis because you do know those tendencies on dropping.
This is why it would really be that best that you should really know on how to make yourself that versatile or would really be that having that kind of adjustment.
This is why it would really be that best that you should really be prioritizing on taking profits on the time that you do have that kind of opportunity on which not all would really
be having that kind of chance or making out the right decision just because of market unpredictability plus the mix of having those hesitation and
non sureness on how this market behaves or moves.