The single wallet address is de facto very simple that I can have with me in any form (print it to a paper, duplicate it to your file on any system and safe it the way in which I would like, and many others.) Create billions ERC20 addresses, come across https://thetopdirectory.com/listings12705676/%E6%B3%A2%E5%9C%BA%E5%9C%B0%E5%9D%80%E7%94%9F%E6%88%90-no-further-a-mystery