Yes paypal use crypto but instead of eth many users was expecting the TRON blockchain its faster cheaper and more used.
Eth transactions still too expensive i hope they start use TRON soon
I don't think that PayPal would ever consider adding a crypto-currency like TRON on its accepted crypto-currencies list. I haven't used crypto-currency on it but as far as I know it accepts a few crypto-currencies at the moment. The PayPal accepts following crypto-currencies: BTC, BCH, LTC, ETH, and PayPal USD which is the stable coin offered by PayPal itself. All of those are well known crypto-currencies and there is no need of adding any other crypto-currencies at this moment, and I must say that all of those crypto-currencies are better than TRON. I would recommend you to go with Lite Coin if you want lower fees because my experience has been good with Lite Coin when it comes to fees, and I hope that it will also be useful for you to save up on fees.
It's a good thing that Paypal is now accepting crypto but we can't question those who are avoiding Eth because we all know that it's fee is too high which has been the burden of many users for a long time. However, I don't think TRON would be the top option of many users. It could be top coins like LTC, BNB and BCH and of course, Bitcoin but I don't think they would pick TRON.
People will always pick coins with a better foundation and higher trust rate because we all know that most Paypal users prefer assurance. I just hope that Paypal will not put too much charges when transacting with crypto because that's also one the reasons and issues that their users has been dealing with.