Ether rallied past $2,000 for the first time since August after a widely anticipated software upgrade to the most commercially important blockchain went according to plan, and as worries of initial rapid outflows proved unfounded. The so-called Shanghai, or Shapella, update enables investors to queue up to withdraw Ether coins they had pledged to help operate the Ethereum network in return for rewards, a process called staking. And so far, 96% of withdrawal volume has been from users withdrawing their rewards instead of their entire stakes.