The content originally appeared on: CNN On Saturday, mana, a gaming cryptocurrency used to buy and sell virtual land, surged to a record high of $4.16, more than 400% above where it was valued earlier in the week. It's total market value reached a high of $7.52 billion. It has since fallen to about $2.99 per token as of Monday afternoon, with a total value of about $5.5 billion, according to CoinMarketCap. The little-known crypto was established in 2017 as […]