Not really, depending on the thing. There (maybe) comes a point where the accounting of who owes what becomes more expensive than the thing you're tracking. It

Not really, depending on the thing. There (maybe) comes a point where the accounting of who owes what becomes more expensive than the thing you're tracking. It can also go the opposite direction. Air is free right now, but then see the movies Total Recall and The Lorax (not joking).