to whom else would you believe?
Just because he made one (somewhat) correct prediction, doesn't mean that he's a genius and he is able to predict everything else. If he was right, then bitcoin should be seeing a drop to $1k or below, as that was his original prediction.
It's obvious that we're in a bear market, and that we are most likely going to continue our way down until at least the end of the year. However, I don't think that we're going to see prices as low as $1k as the buying pressure at those levels are just too great.
If he did say that bitcoin will survive this, then I agree. Bear markets are just a part of the market cycle of bitcoin, it does not damage the long term viability of bitcoin itself.