> The economy will stop growing eventually.
That isn't necessarily true. If we find continual efficiency gains, it may never stop growing for thousands of years.
Most growth curves in life are S-curves. Population growth, etc. But technological advancement could continue until we become a type II civilization.
That's absolutely sci-fi speculation, but there are no signs of technological advancement ending.
If each round of advancement increases efficiency, growth continues. I don't see an end in sight.