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

How is GridCoin Market Cap calculated?

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

GridCoin Market Capitalization in USD = Number of GRC in supply X Price of one GridCoin in USD

Since the price of GridCoin 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 GridCoin or predict the price of GridCoin.