Note that he only says "wallet" not "wallet provider" - OP can you be more specific please? Do you want to create your own paper wallet or a wallet on a online site, where they enable you to open a
online wallet OR do you want to create an application or a service where other people create wallets? This should be posted under newbie section, IF the question is on opening or creating your own
online or offline wallet. Which is it?
wallet provider service
if you mean a service like blockchain.info or even something like coinbase and xapo i would say you are going to have a hard time getting anybody to come and use the wallet because there are these services available and each of them have counterparts already so there is no room for new ones.