When people are fearful and want to get out of Bitcoin, why do you think it is better to buy some low cap coins.
If bitcoin falls to below $30,000 or deeper than $28,000, all altcoins will have free falls. Big cap or low cap altcoins, they will all fall down dramatically.
When Bitcoin bounces, top altcoins will bounce first, not low cap altcoins.
He does not really have a reason to say what he is saying, this is not the moment to invest in anything other than bitcoin, and it could be argued that it is best to stay on the sidelines and see how the market begins to evolve as there is still the possibility the price goes down even more, but if there is one thing that right now seems like a bad move is to invest in altcoins as they are not producing profits and every time the price of bitcoin is going down they move down even faster.