Bitcoin apps and services: These try to make Cdixon bitcoin price more accessible, stable, secure, and useful. Examples: wallets, merchant services, fiat-to-crypto exchanges, crypto-to-crypto exchanges, Bitcoin derivatives exchanges, tipping services, and merchant microtransaction services.
Bitcoin protocol extensions: These are applications that use the Bitcoin blockchain as a global, secure, single-instance database and generally ignore Bitcoin-as-a-currency. Examples: Mastercoin, Colored Coins, and a Princeton project that is building a predictive market. Like Bitcoin, the primary purpose is to allow the store and transfer of value. To me, the first two categories are probably the most interesting. If there is one thing we’ve learned from the development of Internet protocols like HTTP and SMTP, it’s that network adoption is key.