September dump?

So on Jackson hole speech day we saw a pump due to Powell kinda hinting we will get a rates cut. Btc dominance is dropping yadi yada but Benjamin Cowen seems to be quite confident bitcoin will dump in September and Btc dominance will surge back up. Wont that put alts at a new low? I dont see how people are still bullish lol. Btc, eth, sol and xrp will do fine im sure but the other top 50 alts are just going to get rekt no?