There are a lot of various advantages of Bitcoin in general, but it's mostly:

1. For privacy: Not like I'm buying dragon dildos or something similar, but I feel more comfortable buying stuff peer-to-peer; without(or with less) centralized entities knowing what I'm buying. Unfortunately of course, what you can buy with bitcoin online is very limited.

2. Having self custody: not necessarily concerning payments, but it feels great having total ownership of the money(bitcoin) I have; especially right now whereas the whole world is going bonkers.

3. Because fuck PayPal. Seriously. So much problems with it throughout the years that it's unfortunate that my options mostly are pretty much either use PayPal, or use my debit card.