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

How is Theta Market Cap calculated?

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

Theta Market Capitalization in USD = Number of THETA in supply X Price of one Theta in USD

Since the price of Theta 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 Theta or predict the price of Theta.