Maybe I'm making an incorrect assumption, but I assumed the information was already classified. He was betting on an outcome of a planned military operation based on his knowledge of those plans. My assumption is that information is super closely guarded, and likely classified at a high level. Telegraphing your invasion plans is generally not something you do unless you want disaster, right?

Yeah the DoJ proclaims,

“Our Office will continue to hold accountable those who misuse confidential or classified information in a way that undermines and exploits our national security.”

But isn’t wire fraud harder to prove than leaking classified facts?