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

How is OmiseGo Market Cap calculated?

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

OmiseGo Market Capitalization in USD = Number of OMG in supply X Price of one OmiseGo in USD

Since the price of OmiseGo 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 OmiseGo or predict the price of OmiseGo.