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

How is Siacoin Market Cap calculated?

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

Siacoin Market Capitalization in USD = Number of SC in supply X Price of one Siacoin in USD

Since the price of Siacoin 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 Siacoin or predict the price of Siacoin.