Never trust anyone who says you won something. Don't connect your wallet to the fake pancake swap or any other shady website. Only use the contract address straight from the real website, yes, Never store your seed phrases in your phone. Turn off dapps, make sure you disconnect your wallet from pancake swap after you are done using it. Never sell or send coins that just show up in your wallet. Never trust airdrops, Never give out your seed phrases, even to family, just put it in your will incase you die. Never tell people what is in your wallet, you may become a person the hackers and scammers focus on. Never trust anyone online, including any of the advice I am giving you. Turn on transaction signing and password.
I can trust it if I know the person and I know to my self that i participated on that contest. It only becomes unbelievable when some random message pop up and says you won something, no doubt that its just a scam. We shouldn't try to click on it even if we know that they are already a scam because worst things can happen to us.
If we want to be sure that we are on a correct site we should always check the url address and do not neglect the power of bookmark. It can come in handy. In this digital age, the technology have grown too much and so as the knowledge of the criminals. They have now formulated a new ways to scam or hack their victims.