You are right anytime is perfect for someone who is serious to invest in Bitcoin but not everyone waiting to buy during the Dip are traders or intending to sell off when the price appreciate, some of them are not just familiar with Bitcoin and doesn't know that they can literary buy even when the price is high via DCA method and so these category of people or persons just need a knowledge to change their perspective and until they are aware of this their mindset won't change because when I started I was thinking this way but i later realized I was wrong.
No, I disagree with what you are saying here, those that are waiting for the dip before buying are mostly traders because they feels like they can outsmart the market, not considering the fact that by doing so they might miss a whole lot of buying opportunity that would have been utilised properly.
Additionally, about the bold words in your statement, those guys knows perfectly well what they are doing, if they don't know what they are doing as you claim, then why are they waiting before they buy?
It's because they feels like they can buy more at a cheaper rate, so they are traders buddy.