What is the total supply of Bittensor?

Could you please elaborate on the question, "What is the total supply of Bittensor?"? I'm particularly interested in understanding the concept of total supply in the context of cryptocurrencies and how it applies to Bittensor specifically. Could you explain what determines the total supply and whether it's fixed or variable? Additionally, would you mind discussing any potential implications of the total supply on the value and tradability of Bittensor? It would be helpful to have a clear understanding of these aspects as I'm considering investing in this cryptocurrency. Thank you for your assistance.