Sheesh I know for a fact that messaging apps like Telegram and (more recently) Discord is bugged by these scammers as well as social media site like Facebook but I didn't know scam attempts also happen in Instragram where the main content is supposes to be pictures since I don't have any other social media accounts besides Facebook I would only assume that this is more prevalent in Twitter based on what I have seen in the past. I mean at this point anything that would connect you to a stranger has a risk of it being targeted by any scammer. I know services like this are constantly upgrading their security in order to avoid their users being scammed at by the user of their platform but they can't really remove everything so really the first line of defense should be coming from us the users itself, we should always practice our internet security as well have a mindset of if it is "easy money" then it is most likely a scam.
Mate, this is only tip of the iceberg. This post consider some impatience straight forward scam. I even seen some other social media tactic. They will post some very gorgeous lady picture with some luxury lifestyle, approach you and chat with you for maybe 3-5 days or longer before getting into trading. Then they will tell you how easy they can earn money through trading and that's how they support their lifestyle. By using this sort of tactic, those victim will fall into trap way more easier because of their "GREED" and dreaming on other people lifestyle.