What is the max supply of Mina?

Could you elaborate on the maximum supply of Mina? I'm curious to know if there's a hard cap or if the supply is subject to changes over time. Understanding the maximum supply is crucial in assessing the long-term value and scarcity of the cryptocurrency. Does Mina have a fixed supply, or does it employ a mechanism such as mining rewards that gradually increase the total supply? Furthermore, is there any information available regarding potential future changes to the maximum supply, and how would such changes impact the overall ecosystem? Clarifying these details would provide valuable insights into Mina's economic model.