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
You're wrong, plain and simple. It's laughable that you cite Paypal, which have actually just paused and further purchases of crypto currency until an indeterminable date, so are currently looking like they want to back out of the market. Besides that, Paypal were allowing people to trade cash 20 years ago, long before crypto came into existence and they flourished without it all that time. Heck, even Elon Musk got rich from the money that paypal was bringing in from transaction fees and they had everything perfectly manageable on arrays of servers. Financial institutions don't need crypto in the slightest to function, banks have been running even longer than Paypal and successfully moving money around - much faster and at cheaper cost (at least to the institution. Crypto is a threat to their profitability, so they are likely adapting to incorporate or subdue the effects if possible.
Nothing else really matters, how much they've earned through transaction fees, how long they've been around, or how many people have been using them for so many years. The actual point is that they find cryptocurrencies to be a threat to them since they know they are going to be replaced by them, and that is the reason why they are doing their best to make people think that they are supporting cryptocurrencies so that people don't leave them and just use cryptocurrencies.
Whether it's Paypal, banks, or any other financial institution, they all can see the constant growth of cryptocurrencies, especially Bitcoin, and they can't just sit back and see their own downfall and all these things are actually a reaction to that since they fear losing control over the finances of people.