I have this question
"Bitcoin is going up? or is the dollar going down?"
Did any will take a loan in Bitcoins? probably no because will require much more dollars to be payed in the future.
What if simply the real inflation is eating the dollar value?
Bye.
You can't discuss the dollar value unless you define some sort of measuring stick. Are you measuring USD in precious metals, oil, another currency, or something else?
Also, since you mention inflation, I am obligated to mention that rising interest rates suck dollars out of the economy, which is deflationary. Keep an eye on interest rates after the FED notes are released tomorrow.
No mater how you measure it, Bitcoin has outperformed any other asset, so it's rise can't be solely due to USD inflation.