You can check out above graph to see how the market cap of Gas has changed over time. The market cap value depends on the value of Gas on that particular day and number of Gas in supply at that day.

How is Gas Market Cap calculated?

The Gas Market cap is calculated using a simple formula. You can find it below:

Gas Market Capitalization in USD = Number of GAS in supply X Price of one Gas in USD

Since the price of Gas is highly volatile you can see the market cap going up and down a lot. Sometimes price and market cap are not linear to each other due to increase in the supply of coins in the market and stable or decrease in the price of the coin. So you can say that it's not simple to predict the market cap of Gas or predict the price of Gas.