I get messages everyday in Telegram.
Most of them approached me as investors, group admins or affiliates.
One way to detect them is that they will approach us first. And they always start with 'Hey User'.
Real investors or admins dont simply approach other people until we ask for their help first.
Yes i had ever been receiving a personal message through telegram, asking if i'm an investors, just be safe for myself, i always tried to keep my composure and stay calm to be able to be avoid being scammed by those kind of people.