Arbitrum, one of the most popular Ethereum Layer 2 scaling solutions, successfully launched its Nitro upgrade this past week. Although the release brought many significant improvements, a native Arbitrum token was not one of them. As investors wait for Arbitrum to launch its own token, perpetual futures exchange GMX—one of a few native projects built on Arbitrum—has meanwhile become a popular DeFi trading exchange. Arbitrum is based on what is known as an "optimistic rollup," a type of data c...