TOR IS NOT SECURE! But by all means keep using it. It does nothing for security of data i.e. encryption. It is only encrypted from you to the exit router. From the exit router to the destination it is clear text if it started that way, such as http. Https would remain encrypted. Further your DNS not encrypted and finally, layer 7 info could be used to track someone down. If you don't believe me, install the routing service, fire up wireshark, become an exit router, and start capturing data on http, smtp, etc etc.