Now, the next question is this: Will they not run out of unique wallet address later on?
No.
In my opinion, it can take so many years before that could happen but I am not a mathematician so don't take my words for it.
Bitcoin addresses are a 160 bit hash.
Therefore there are 2
160 = 1461501637330902918203684832716283019655932542976 possible addresses.
That's
1.46 X 1048 possible addressesThe universe has existed so far for about:
13.8 billion years * 365.25 days per year * 86400 seconds per day = 436126032000000000 seconds.
That's 4.36 X 10
17 seconds.
If you started 1 BILLION computers at the Big Bang and each computer created 1 BILLION addresses every second until today....
You would only have created about
436126032000000000 seconds * 1000000000 computers * 1000000000 addresses = 436126032000000000000000000000000000 addresses.
That's
4.36 X 1035 addresses created.That means with a BILLION computers each creating a BILLION addresses EVERY SECOND since the BEGINNING OF THE UNIVERSE, you still would NOT have computed even 0.00000000001% OF THE POSSIBLE ADDRESSES yet.
How many years do you think it is going to take a normal amount of computers, creating a normal amount of addresses to "
run out of unique wallet addresses"?
But, to be pedantic, it is still possible to create an address that is not unique. It is just
unlikely.