[sweetiepiezer]

https://www.jamespaynelaw.com/blog/federal-crimes-statute-of-limitations/

Treason. Treason, a crime against the U.S. government as defined in the Constitution, is a federal crime with no statute of limitations.

[Steve Van Doorn]

Treason: is a federal crime with no statute of limitations."

I agree with you it is. Assuming you have the evidence of Treason(hard to prove.)
Racketeering would be easier.
To get that evidence after the statue of limitations will make it a lot more difficult.