PayPal is strict and just joined the bandwagon. With the first days of their adoption, they don't have a withdraw option and this option was just allowed later on. If you've got some funds in there, withdraw the fiat and deposit it on the exchanges like Binance or any other popular exchanges that's easier to access.
It did not "just join the bandwagon", it was here for a few years now. But still, I wouldn't put even $1 of crypto on a PayPal account if I were you. Because that's the method a lot of fraudsters are using to cash out, so they are going to freeze the account and ask you for additional documents.
If you use PayPal for other stuff (and you probably do), it's not worth it IMO.
I still remember the days when everyone was talking about Bitcoin as the potential competitor of PayPal and then, it has joined several years later.
It's also easier to buy on Paypal since banks trust them and most people have some PP income already.
Not all banks are too trusting in online transfers like PayPal. There could be some times that a teller or the bank itself will question your transaction there. And if you'd mention crypto, bitcoin, etc. there were some cases that they're considering it as a red flag.So PP is ok if you don't mind holding your crypto with them long term.
Please don't do this. We're even discouraging people from using centralized and known crypto exchanges to keep their funds there for long-term holding. If you're going to hold long term, leave PP and use a hardware wallet or electrum for Bitcoin.