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

How is BlackCoin Market Cap calculated?

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

BlackCoin Market Capitalization in USD = Number of BLK in supply X Price of one BlackCoin in USD

Since the price of BlackCoin 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 BlackCoin or predict the price of BlackCoin.