the fact that it is mostly used for speculation, and the fact that you have not yet seen or maybe looked for its usages doesn't mean it doesn't have them.
Growing and building your own business has never been so easy thanks to Bitcoin.
it is easier with bitcoin! and it actually will be a lot more profitable if you do it with bitcoin because there is a lot of room for new businesses that already exist with fiat but not with bitcoin.
take a look around you and you'll see a lot of them who are thriving:
- payment processors such as Bitpay
- gambling sites: just look at some of the signatures and how much those websites are earning!!!
- online shops: there are a lot of them selling all kinds of stuff, from digital small goods such as gift cards (Gyft.com) and games,... to bigger physical goods.
- exchanges
- web wallets that control the private keys such as XAPO and Coinbase
- bank like services that are issuing debit cards for bitcoin.