Scammers create urgent situations to convince victims to withdraw cash from their bank accounts and deposit it into a Bitcoin ATM using a QR code that links to the scammers' wallets.
This is an important point as scammers often create fake urgent situations to force their potential victims to take action quickly on their request while don't have enough time to do searching and have time to considerate the situation more deeply and carefully.
If you notice this point, you will very less likely become a victim of scammers. If any stranger contacts you, it's an alarm. If he asks you for things related to money, it's a second alarm. If he tries to put you into urgent situation, it's a third alarm. So you can stop right here, and quit the conversation, and you will never be scammed.