That could be a valid statement only bitcoin is adopted as much as US Dollars.
Until then, you check the price of bitcoins in dollars, not the opposite.
Sure, but it's rapidly growing.
We may soon enter an ambiguous phase. Today, 1 USD = 1.35 EUR. Last week, 1 USD was 1.38 EUR. Has the US Dollar gone up, or the Euro gone down?
Same with Bitcoin.