Well, it depends on what happens afterwards. If the UN just says that they know about it but don’t show anything, I’d be excited but if nothing happens then I’d just continue what I’m doing. I’d certainly keep a closer eye on things and try to find out as much as I can. But, what I’d wonder about is the implications. If the government said “yeah, aliens have been here this whole time.” Then what would that mean for the world? If aliens are here then certainly they could’ve been exchanging ideas and technology since they mostly came from somewhere far away. And, if it turns out these ideas and technology that could potentially fix a lot of problems we have on earth, like replicators from star trek, or the cure for every disease, or emission less transportation, and they knowingly withheld this in order to ‘keep the secret’ there will be hangings and assassinations. I’d be excited but cautious.