While Bitcoin and Ethereum gained more than 90% and around 460%, respectively, in value over the last 12 months, these two are not the biggest gainers of 2021. The best performing crypto was GALA, which increased almost 250,000% during the last 12 months, having a market capitalization of around $3.7 billion as of Monday. Next comes AXS, which saw around an 18,000% increase in price during the last 12 months, and currently has a market capitalization of around $6.5 billion.