Note that I didn't say "grow infinitely", I said "grow indefinitely" – as in continuous, steady growth (historically, about 2-5% per annum). Basically, if you c

Note that I didn't say "grow infinitely", I said "grow indefinitely" – as in continuous, steady growth (historically, about 2-5% per annum). Basically, if you can keep working productively while the sun shines, this is growth. Physicists deal with real objects (virtual particles and string theorists notwithstanding). Wealth isn't real – it's abstract. As for abstract wealth... here, I'll give you an "I owe you" for $5. You now have an asset. You can trade that asset with other people since I'm a respected individual that others trust. I'll fulfil the value in future (maybe) but for now – the value came from absolutely nothing. It's entirely abstract. You want an infinite amount of them? Here you go.