What’s all the fuss about NBA Top Shot?

Most days, Daniel Hurtado puts his youngest down for a nap at 1 p.m. Then the 38-year-old father of four will go to his computer. He’ll put his device away in the afternoon, but after readying his daughter for bed at night he’ll return to his laptop again to do one thing: trade on NBA Top Shot.

NBA Top Shot—a partnership between the NBA and Dapper Labs, a blockchain company with a history of highly trafficked marketplaces—is, in its simplest explanation, an online forum for trading virtual basketball cards. Fans can buy and sell video clips of their favorite players, called “moments,” from recent seasons. These moments exist on the blockchain—essentially, a digital record book kept using cryptography—which makes them unique, impossible to counterfeit and immediately authenticated. And they can be procured from one of two places: directly from Top Shot, in the form of limited-edition packs that sell for anywhere from $9 (for a pack of common cards) to $999 (for one that could contain some of the rarest in the game); or in the marketplace, where moments opened in the aforementioned packs can be swapped between users for cash. If this all sounds novel, know this: It’s not the first such partnership with a professional sports league. It is, however, easily the biggest.

What started late last year as a new trading forum with a few thousand users has, in the last few weeks, exploded onto Twitter feeds as certain moments sell for eye-popping prices. A scan through CryptoSlam—a third-party tracking source that monitors marketplace transactions—will show 83 unique trades of at least $40,000, with six moments breaking six figures, the most expensive being the sale for $208,000 of a Cosmic edition Series 1 LeBron James dunk from a game against the Kings on Nov. 15, 2019.