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

How is Nxt Market Cap calculated?

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

Nxt Market Capitalization in USD = Number of NXT in supply X Price of one Nxt in USD

Since the price of Nxt 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 Nxt or predict the price of Nxt.