If you own something you have two choices – share it or don’t share it. That’s it.
If you share it — and by share it I really mean, “let other people use it for free” — then it isn’t capital in any classical sense, though you may be mining social capital through the act of sharing.
If you don’t share it, by the above definition, you are, by default, capturing it and it becomes a capital asset (and liability, the balance between the two being particular to whatever the thing in question is).
This doesn’t seem particularly controversial, but the consequences of starting with this simple decision can be profound.
And yes, you could try to do both, but that becomes disingenuous almost immediately, so pulling it off is very difficult for any possible thing.