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Paypal does 228bn USD. At that point we've already "scaled" financially past Paypal with our "pitiful" 9 tx/s, and with fees being at ridiculous costs like 0.02-0.05$.
Don't underestimate the scaling of value transacted. It's a very important side of scaling.
So if it's possible to make 1 Bitcoin transaction per year, but it's a darn big one,* we beat PayPal at its own game

*a trillion gudzillion dollars, so BTC market cap will have to be at least that, which it will be, because math & bonus.