Everyone can see that this "prediction" was made in the event of Bitcoin spiking up and not many projects following suit. Now several maximalists in the space take this as a sign. The 'pattern' of Bitcoin going up and altcoins staying stagnant is now spun into the ultimate speculation.
Uh huh, give it a year and see what happens. This kind of FUD and maximalism is ridiculous, as if Bitcoin can fulfill the entire market demand without smart contracts and 10 minute 1 MB blocks.
Now could very well be the best time to buy 'altcoins' given the current market sentiment. Many projects became oversold when Bitcoin crashed recently.