I'm betting as it were on the vast potential Bitcoin has for an increase in value. I don't think that the inflation of the US dollar will be directly and mostly inverse to the change in value of Bitcoin. It seems to me that inflation of USD will drive way more people into Bitcoin as a way to save their money.
Also, it may be the case that when bitcoin gets to $100, it may be because the us dollar has lost an inverse proportion in purchasing power, so you end up with the ability to buy as much as you did before
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Look at it like more people with "more" (inflated) money will be investing in Bitcoin; not just the same people with "more" (inflated) money
My outlook is based on the fact that I think and hope that people will be smart enough to adopt an untaxible, untraceable currency that can't be inflated by a central distributor/printer; and that outlook will hopefully never change.