What if I create 1000000000 addresses?
What if you create 1,000,000,000 addresses? You have no worry. Here's why. That number is 1 billion or 10^9.
Imagine how many grains of sand there are on a beach. Got it? Now, realize that in one grain of sand there are about 22,000,000,000,000,000,000 atoms (over 10^18).
Now imagine how many atoms there must be in the
entire universe. Got it?
Realize the number of possible bitcoin addresses is about 1 for every 8 atoms in the universe.