It is all of these at the present, but in a time after we are gone I would say it would be more of a commodity, as in a store of value like precious metals more so than being used as currency like it is today.
thats not what a commodity is
its a raw item used to create other items
bitcoin for years was just bitcoin. coins never moved off the network(and still dont)
however the sidechains/pegged altnets stuff now happening is creating tokens/new units based from locked bitcoin. so its now presenting itself as something like a commodity
(my personal view is bitcoins never leave the blockchain so these other network units are not bitcoin.. however a cake is not flour.. plastic is not oil. but you cant make a cake without flour and you cant make plastic without oil. so im warming to the idea that its becoming seen as a commodity(though have reservations as to how strong the connection is from item to items linkage/requirement))
this is not to say that some of these sidechains and altnets are bitcoin. or reliant on bitcoin because many sidechains and altnets have proven by not having deep code HARD rules to audit and peg their units to only work with bitcoin.
but bitcoin could, if some new project was to start that could truly be shown to be a product of bitcoin,. then yes bitcoin would be a commodity
i have yet to see a sidechain or altnet that truly held strong to a unbreakable rule that truly people could trust the pegging mechanism would never break though.
and no. this is not an oppertunity to advertise your sidechains or altnets