About some individuals, these people are only looking on a single and not on a whole forest. They worried too much about how the price decrease without realizing how much it grows prior to price dip
This is definitely not about "some individuals"
As it is more about all of us because this is how human mind and brain work in general. Our expectations of the future events (in this case, Bitcoin's price) are intuitively based on, and subliminally affected by, the most recent happenings. So even if we know for certain that the last price decrease is only a minor correction, we still feel worried or even terrorized by this drop
It has more weight for our internal decision-making machinery simply because it is closer to us and thus influences us stronger. In other words, recent events have more weight than remote ones even though the former are temporary while the latter are here to stay (and despite the fact we may actually know that)
That is called the recency bias and for a trader it is one of the worse biases we may have, one perfect example was the bubble of 2017, when the price reached the top and began to go down many traders instead of taking their profits thought the price will continue to climb and they began to buy even more coins, then when it finally became clear we were in a downtrend instead of selling they held because the previous high price was still too fresh in their minds and we know the horrible losses they suffered as a result of that bias