Bitcoin does not depend on scarcity to determine its value. Its true value lies in its wide acceptance.
Everyone who can see here knows that Bitcoin's first transaction is a pizza worth hundreds of millions of dollars. The generation of this transaction is very simple. The simple one is:
A: I have Bitcoin, do you approve it?
B: Approval
A: Then I will use 10,000 bitcoins for you. You can give me pizza.
B: Transaction