The exchange rates of normal currencies are primarily interesting as tools to look at trade deficits &c. I can't think of an analogy with Bitcoin. I think the only reason this is interesting is because so many people treated as an investment. Using it as a store of wealth is clearly silly -- much too volatile. But Bitcoin as investment seems very common. It's hard to emphasize how bizarre that choice is, but suffice…
Why is it bizarre to use it as an investment choice? If you have a sense for what makes a technology prevail and think that bitcoin will, it isn't a big leap to look at the value that can be transferred through bitcoin and say "in the success scenarios, it will have to grow to be many times larger." Like any investment, you have to be prepared to be wrong, though.
The analysis above is completely correct... and also available to precisely everyone, and is how the price is set globally. You aren't buying at a nerds-only price. So what you are really saying is that you are a more accurate speculator on currencies than people who do it for a living and have large trading and research apparatuses at their disposal. Could be true, but if you haven't attempted to speculate on currency before, there's no way for you to know that (and the prior probability is low).