No, it isnt wrong. you have to wait until the day of the distribution of the divy or the day after, i cant remember right now and im to lazy to look it up again. But it sounds like you probably should. Its on the sec website.
everyone must make their own decisions. But imo it is clear that you will NOT get TLGP divy if you sell your MONA stock now. itlogic, kraken, strongtower and I agree on this point.