The statute of limitations apparently goes on pause as soon as you cease to reside in the state. You can trust that the prosecutor is already well aware of what they need to consider there. The prosecutor will also be very live to the issue of Cohen’s credibility, and what that means for what would need to be proven for any offence(s) being considered.
In terms of legal jeopardy, the New York investigation is the least serious of the three criminal investigations orbiting Trump right now. It’s simply the one that was first to potentially approach the indictment phase, and for that reason has generated more than its share of excitement from some.