If an address collision happens, it'll be because of poor random number generation. The probability of random addresses colliding is so ungodly small that it will never happen in the entire life of bitcoin. The fact that you think it's possible is more demonstrative of the failing of the human mind than the design of bitcoin. The sheer number of addresses is simply unimaginably large.
QFT. The sheer number of addresses is simply as unfathomably vast as the universe itself.There are MANY MAGNITUDES more Bitcoin addresses than there are grains of sand on the Earth.
