I see your point. However, my angle is on the fact that /BTC going to near zero is because BTC will no longer be the reference coin. Rather, it could be ETH/BetterCoin, or ZEC/BetterCoin, XMR/BetterCoin.
In other words the bearish pattern is not to reflect that the Altcoins will get less to BTC but it will no longer be used per /BTC; rather, /SuperCoin.
That SuperCoin could be any coin, we just don't know which one.