If you live in the US, the Asian lady beetle is infesting our country and nothing stops them because they have no natural predators here. They are not our treasured gentle red ladybugs but orange and even some are almost yellow/brown. They bite, they can stink if you crush them, and they pour into houses during the end of autumn to hibernate in corners. They literally pour into my house through my front door. I'll open it up to my screen door being full of them inside and out! The aphids accompany them during their migration period and they fit through the screens in droves, but don't survive long enough to be pests. The asian lady beetles are in my house as I type this, smacking into wall and huddled in corners in pairs (with their mate). I find them dead randomly throughout the winter as my house spiders assassinate them one by one. If you try to remove them yourself, they'll release this fluid that permanently stains whatever they were resting on. They don't go after food, so I just leave them alone. If I throw them outside they'll die in the cold or end up dead in another building they decide to swarm.
Does it mean anything? Technically luck. But I don't find these orange ones lucky. I'm lucky if I can spot one of the pretty red ones I grew up being so fond of.