Exactly. If you're measuring BTC value in USD, then a fall in value of USD also means a fall in value of BTC.
You guys realize that dollar debasement results in more dollars needed to price in equivalent value? So the dollar-based price would in fact rise. Part of that dynamic is happening in gold right now.
But if the dollar falls, and the price of BTC in dollars stays the same, then BTCs also were devalued.