Crypto as a Payment Method?

So I am not really into cryptocurrency and only have some basic knowledge. As far as I understand the idea between crypto (or especially bitcoin) was a decentralized payment system. Everything I heard about crypto the last few years was only about trading and value going up and down blabla. How is it going so far for using it as a payment method? Are there countries, systems, spaces in the internet or anything that actually use crypto for paying? Whar are some good examples? Do you yourself use some of these?

And are there maybe even PayPal-like Apps which you can use for paying in crypto to others?