It doesn't google anymore and might be gone now, but back in the day there was an article on a bitcoin website which went through some math, arguing that Bitcoi

It doesn't google anymore and might be gone now, but back in the day there was an article on a bitcoin website which went through some math, arguing that Bitcoin could achieve 4000 transactions per second. People used to link to it on a regular basis. Aside from that, people figured Moore's Law would continue at its historical pace, and Bitcoin could grow indefinitely at the same pace.