well, since no one knows how much sands out there on this planet, how dare the experts say the numbers of bitcoin address is greater that all sands on earth (or dust over the universe )? How they come up with this conclusion?
That is just a representation of 'how much' really means for bitcoin, though one can never actually count the number of sands around the world. 2^160 still is a stagerringly huge number, and relating that number to the number of sands for the number of possible addresses in bitcoin, I think, is not exaggeration but a just comparison between two relatively uncountable things. I know they have placed a definite number to work with in generation of addresses but seriously, who would bother getting all the possible combination anyways?