First, don't believed everything you see and hear on youtube specially about crypto, most of them are shills anyway. Even some of them who posted TA are bunch on noobs.
Second, not just in crypto, but there are a lot of scammers out there, so the best weapon against them is to educate yourself. You have to ask yourself, why you need to contact unknown person? You yourself can do trading and investing on crypto.
Listen to this and its always been like that, not only limited to crypto but also in traditional markets and hypes as well, as long it would be the trend then those scammers would really take advantage of it
specially now that crypto is on the main trend as of this moment where those scammers would really be creating something deceiving to lure in those noobs to believe that easy money or methods does exist.
If you do make use of your own common sense then you can easily spot out things like this but if you do let your greed control or overcome you then it would really be a big problem soon.
Be aware and be careful to save up your ass into these scams.