Fraud warning with multisig wallet
Currently, there are many fraudulent accounts that can sneak into groups, pretend to give you an account key to log into your wallet, see money and say it doesn't know what's wrong so you can withdraw the money.
You will get greedy, try to add some gas to see if you can withdraw it and then fall into the trap.
These Multisig wallets will need multiple private keys to unlock the token, so just 1 key will not do anything.
No one will suddenly give you money to download, remember to control your greed.