I completely agree with your point of view. To be honest, the reason why I made the current deduction the way it is, is because BTC more or less controls the entire crypto sentiments. Therefore, it going up/down will trigger a similar reaction to the altcoins.
But yes, you are absolutely correct on the fact that if we cross 160B-170B market cap, or 4700 dollars in BTC, then the next stop is pretty much at 5500 dollar in BTC if you ask me!