There is nothing special or important about a single entire Bitcoin. It’s completely arbitrary. The question is whether Bitcoin is scarce. If there are millions of trillions of tradeable assets, it’s not scarce.
If most of it is locked in someone else’s account and they won’t sell it to you: it is scarce. If nobody wants to buy it: it’s not scarce. Scarcity is based on supply and demand, not on a single number.
