What is Max ETH supply?

Could you please elaborate on the concept of "Max ETH supply"? Is there a defined limit to the total number of Ethereum tokens that can ever exist? Understanding the maximum supply is crucial for investors to assess the scarcity and potential long-term value of Ethereum. Does the current supply approach or exceed this theoretical limit? If so, what are the implications for the market and future price movements? Clarifying this fundamental aspect of Ethereum's economics would greatly aid in making informed investment decisions.