Right now Bitcoin have a market cap of $172B, and for Ethereum it's $110B.
because bitcoin has 16,800,000 coins while ethereum has 97,330,000 coins. that is
5.79x more supply while it has
0.63x bitcoin's market cap!
What do supply and market cap have to do with eachother? The only thing it shows is that the value per coin is lower for a higher supply coin..