If you had asked anyone to implement PayPal support 10 years ago, you would probably not experience +370% increase in revenue. It would probably be more like 21,2%.
But because it stuck around and gained traction, it is now a sort of "default" for non-credit card payment. Which explains the 370% figure.
But PayPal is "evil" and we know this. It is a centralized outside your control. It can seize the funds in your account. It can be corrupted by governments. It can be instructed into what it can and can't support by credit-card companies, etc etc.
That not how currency is supposed to work. You own it. You exchange it. You give it to who you like to give it to. Your money is yours to do with as you please.
So we need a new approach which addresses the centralized nature of PayPal and the ownership issue of the funds. And BitCoin does just this!
Today it is 21.2%, but who knows? It may stick around and completely decimate PayPal if it becomes a new "default" for non-credit card payments. After all, if BitCoin is supported and has zero costs and a lower risk, why would anyone need PayPal?