If you feel unsafe, don't use it and ignore it. If I remember correctly, there was some news before that Telegram was developing an exchange to compete with other exchanges, and this could be their first move. After all, their service is a centralized service no different from the centralized exchanges we already have. Meanwhile, we have plenty of other reputable exchanges on the market, but if you're using one of them, go ahead and skip Telegarm. Furthermore, these exchanges are for trading purposes only, and do not use exchange wallets to store bitcoins or other cryptocurrencies.