Oh, and if we assume 100,000,000,000 people in the world, and each of them doing 10,000 transactions each day, it will take 3.8*10^30 years to run out of addresses. The first address collision will, of course, come a bit sooner than that. For comparison, the current age of the universe is generally thought to be around 1.3*10^10 years.
That's good info. I was looking for this math. The system seems really robust.
We'll have reached
Civilization Type 3 by the time we run out of addresses.