Messaging people from instagram and facebook should be avoided too. If you followed/liked some crypto (famous) related pages/account, you will be receiving PM from these accounts, so just ignore them, mark as spam and delete it for good.
Major scams happen most on the use of social media. It was easy for scammers to change their identity, images, and to get another victim. Ignoring their offers is the best way to avoid scams but to unfortunate that not all have that kind of thinking, instead, they even have the courage to risk their money when someone makes a very attractive offer.
Ponzi schemes, received your profit every day, double your money in 24 hours...oh, there's a lot of sweet offerings we heard from scammers and of we are not familiar how the market works nor being stupid and greedy of money it definitely we fall in them.