Leo:
The fallacy of your position is apparent in your analogy with Amazon. Amazon had and still has the potential to generate large profits for investors, who get the profits earned as a result of supplying goods and services. If no new investors bought Amazon for the next 50 years, the current ones would earn the profits.

With Bitcoin--the only way a holder profits is when new buyers are recruited, or a group of existing buyers increases their investment more than the amount required to pay the miners.