Jack Patrick Dorsey is an American Internet entrepreneur, philanthropist, and programmer who is a co-founder and former CEO of Twitter, Inc., as well as co-founder, principal executive officer and chairperson of Block, Inc., the developer of the Square financial services platform.

This market will resolve to YES, if by the end of 2025 Jack Dorsey informs that he has deleted his profile on Twitter/X.

https://twitter.com/jack/
https://x.com/jack/

If @jack's account is not active but it will be in question, whether he deleted it himself, or was somehow banned from the platform - this market will wait till January 14, 2025 for clarification. If it is still unclear - it will resolve to YES.