To be fair, I don't think this statement is being used that much with altcoins though, mostly just with bitcoin.
I've seen a lot of groups using the same phrase to deny that their future is bleak. Mostly ICOs group though. Some of them also said that if you see a price drop, that means it opens up an opportunity to buy more. Very optimistic even though there is no real product, real demand, real usage of their tokens.
New traders should learn first the most common mistakes every trader made, so they don't fall for deceiving phrase like those.