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

How is Dogecoin Market Cap calculated?

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

Dogecoin Market Capitalization in USD = Number of DOGE in supply X Price of one Dogecoin in USD

Since the price of Dogecoin 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 Dogecoin or predict the price of Dogecoin.