This could be a new but old trick they are using now to come in disguise as a lady with a modest picture that could convince their victim to think they are responsible and calm to deal with, but their ulterior motive is to trick you into a relationship kind of conversation, and see how you flow so they can present you a link which you will click to either hack you or deceive you in making payments for their investment plans which is fake and a scam to say. We just ought to be more careful and alert to their tricks and gimmicks so we do not fall for them, as they are everywhere looking for whom they can take advantage of.
Most scammers disguise themselves using photos of Asian women or stolen stock images from the internet that appear more professional and convincing.. By purchasing Telegram's premium subscription, they can DM and target people they find in a cryptocurrency-related Telegram group, pretending to be more experienced in the field. They can even send fake proof of their profits, and in the end, the victim finds himself facing a phishing link or a fraudulent link to a phony trading platform.
Therefore, fraud on Telegram does not stop at what the OP mentioned. Many fraudulent bots are now spreading widely in Telegram groups, through which anyone can lose their money. Therefore, no one should trust strangers they do not know on Telegram or start any conversation with them; it's best to simply block and report them as spam.