It's not a token or store of value. Bitcoins only have value to the extent that others will buy them. There is not a person on the planet that has a contractual obligation to exchange or buy Bitcoins for anything.
You're right, we are literally talking about the buying and selling of random numbers. However, once again, Bitcoins have zero inherent value. There is no person or organization that has any obligation to buy or otherwise exchange them. They only have value to the extent that others will buy them.
Things with easily accessible, live-updated exchange rates have value. We're not talking about baseball cards here.