Rumors are that he will run for President in 2024
I expect that Biden's approval ratings will be soaring in 2024. Republicans will need a sacrificial lamb; Christie could serve that role.
Honestly though - Christie's chance to run was in 2012. He was the young, cool, hip governor of NJ at the time. Since then, his name has dropped by a lot. He developed the reputation of being a sleaze in NJ (he took his family to the beach at the same time that he closed the beaches to the NJ public)