Of course you can be traced, you log-on to your ISP, it assigns a dynamic IP and it records when you used that IP. Some countries have ISPs maintain records of this use so they can be accessed by law enforcement.
Hiding an IP doesn't aid Internet Security as when you use something to hide your IP from general observation, what you are browsing still has to be delivered to your real IP address and what is to stop that being malicious. Just because you theoretically hide your IP doesn't mean it doesn't exist so when you browse an infected site for instance, any malware could still be delivered in the same way as the content of the web page.
For the most part there are random attacks where they don't know your IP but simply use random IP address generators to try speculative attacks, hiding your IP won't stop that either.
So all in all I feel hiding your IP is a bit of a waste of time.