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.
They tried. But they failed. Especially Telegram groups are full of SCAMmers. A few times I was the one who promised to send me Bitcoin. I've blocked all of them without reading or speaking

A must have attitude for a certain person. Anyone that approaches randomly without any expected transactions from other people then most of them 100% are scam.
So if you don't like to experience problem then better to ignore it directly but sadly there are still people who got victimized but well experience of loss will always be a good learning too.