All currencies do. In exchange markets currencies are often measured in reference to each other, just pop open Bloomberg's currency page: https://www.bloomberg.com/markets/currencies

How would you rather track its value?

I am not a proponent of crypto currency by any stretch, but I disagree with this. The fact that BTC has dollar value simply indicates that BTC can't be spent everywhere the dollar can. IMO the real failure of BTC is runaway deflation, which leads to it being an "investment" relative to fiat currencies.

Today it's pretty much just for launderers, criminals, gamblers, and people who don't know how it works/people looking to take advantage of people who don't know how it works.

Is there something wrong with that? Sounds like freedom to me.

How is that even possible? I can't think of a single thing, material or abstract, that doesn't have a dollar value attached to it.