It (possibly) adds a layer of security. Of course you're just passing your traffic through them. Should they get summoned to court or ordered they could turn over your information and show you were trafficking through them. I'd say to read into how your nation persecutes copyright. How strict are they, how often have people been legally attacked cause of it, etc. If you're in Japan for example, I'd say 100% use a VPN. Copyright is extremely serious there.

Look, if you want peace of mind use it, but it is also true that you will most likely be fine with it.

I personally use NordVPN, and I have been always torrenting with pretty good speed. I am pretty sure there are cheaper alternatives.

Good luck to You. :⁠-⁠)

Definitely should have one. Highly recommend Proton VPN personally. I love their software suite.

What if i have self-hosted vpn? am i safe now? (wireguard)

If using qBittorrent there is an anonymous option. Not sure if works well but I haven't received an ISP email in a long time since I set it