I believed that it is not really going to be easy to be hack, like if you click a link your not really gonna get hack that easily unless you just got trick into putting your information to a fake website something like that, its a different case if the telegram is the one getting hack, in this case its probably better to avoid strangers since you can already see that the intention of someone want to have a chat with you is to trick you.
Just be safe and don't click any link or install file sent to you by a stranger you met online. If you must, always scan to see if it's infected, because hacking has gone much more sophisticated than what you think. By mere clicking a phishing link, the attacker can remotely access your device and steal your sensitive information like social security number, credit cards details, password, seed phrase etc. If you're still skeptical, you may want to read this
article, how a hacker stole 4,502 bitcoin from Japanese largest exchange DMM.
Installing some kind of apps that you dont really know is actually the easiest way to get hacked, since most of these applications can easily be some kind of malware, so installing an app is just the easiest way to lose your fund or your account here in cryptocurrency, if someone is telling you to download an application it is obviously a red flag already so make sure to block him quickly and dont entertain him anymore or straight up report his account.
Also most of the time, it is mostly on phishing, so if someone wanted you to fill up some webpage with your information, that could also be an indicator that they are trying to scam you, to get your funds, the best way to avoid is just being aware of this kind of things if you know about it there was a very low chance that you will become a victim of it, most of the time, clicking the link would put you on a similar page like for example your bank webpage, or even your social media webpage, if you know that you are logged on your account then, you suddenly just needed to relogin again when you click some links, always wonder because it might be an indication that you are dealing with a scammer or a hacker.