They didn't buy any as they wanted more dip...Perhaps, this is the mindset of the people who are actually not in the interest of buying Bitcoin. They are just good at speaking but not good at doing. They want the dip, but they don't spend any penny because for another reason (what IF's). We can hear a lot of stories about this but we can't force them to take risks when they are not nor ask them to try.
Investing is a matter of choice, not all see the potential of Bitcoin, and even how many times it has been proven, still a lot of people keep ignoring it.