If you want complete security unplug your pc from the internet and keep it in a safe, any other measure is risky

Or use a proxy, a vpn or something if you are so concerned. But P2P is not a security risk in itself, p2p is a tool. Its like saying that handling a knife is a security risk by itself. It is if you are careless. There are a thousand measures you can take to be more secure, your IP is not everything. There are IP scanners that can show if you are vulnerable even though you have your torrent off.

First step, check that your ports are stealthed: https://www.grc.com/x/ne.dll?bh0bkyd2