Rather than letting players port weapons or powers between games, non-fungible tokens will more likely serve as building blocks for new games and virtual worlds. One of the most enduring legends in the cryptocurrency industry is that Vitalik Buterin started Ethereum because his warlock got nerfed. "I happily played World of Warcraft during 2007-2010," Vitalik wrote in one version of the story. "But one day Blizzard removed the damage component from my beloved warlock's Siphon Life spell. I cried myself to sleep, and on that day I realized what horrors centralized services can bring. I soon decided to quit."

On Thursday, publisher Activision Blizzard revealed the first footage of gameplay for Destiny 2, which will launch in September for PC, PlayStation 4 and Xbox One. The game is developed by Bungie, the studio behind Halo, the video game franchise partially responsible for the success of the Xbox brand. After watching the reveal of Destiny 2, live streamed from Jet Center in Hawthorne, Calif., it appears the sequel is mostly sticking to the formula of the original. But there are some notable changes. Here's what we learned about Destiny 2. That's how game director Luke Smith describes the experience in Destiny 2. The series focuses on Guardians, protectors of the last city on Earth.