Otherwise, how do you know how much it is worth?
For example, I’ve been spending a lot of time at the local arcade in the AEON MALL in Phnom Penh with Seneca, and I have no idea how much one coin was worth. I just discovered that one US dollar is six coins.
I suppose this is where knowing how much one bitcoin is worth is useful, in respect to the US dollar. And all other cryptocurrencies are pegged to Bitcoin.