The shares of POET will remain shares of a Canadian company (so long as POET remians a Canadian company), where they are traded does not change that. If we get to NAS, my guess is there will also be an uplisting to the TSX.
Whoever is buying, I'm pretty sure the recent frenzy is not fueled by posters, as I believe most here have not all that much capital left for investment in POET. Have to say, it all seems darn good right now. But until we cross the goal line fundamentally (40nm, maybe, but certainly material revenues with a clear indication from where more and larger revenues will be generated), I would remain on an even keel. Nothing wrong with a little celebrating and congratulating along the way, though!