Because Paypal knows how to get even more money. Their arrival in crypto, in my opinion, has created a new wave of crypto interest among people.
The worrying thing here is that with more people getting into crypto, we might see a surge of newbies losing a lot of money in trading since PayPal made it much more accessible. Although, I feel like it can help a lot of people too, we might see some people losing but we will also see people profiting.