In trading, it is the act of measuring the performance of one asset by comparing it to another. In computer science, a benchmark is a process of assessing a computer or program's performance using a battery of standard tests.
Bitcoin is most known for being the first cryptocurrency and blockchain officially released in 2009. Bitcoin as defined by its creator Satoshi Nakamoto: “a purely peer-to-peer version of electronic cash would allow online payments to be sent directly from one party to another without going through a financial institution… We propose a solution to the double-spending problem using a peer-to-peer network.” https://bitcoin.org/bitcoin.pdf
An individual that operates as an intermediary between their clients and a specific market to trade securities and other tradable assets. Broker-dealers also give advise, provide liquidity as a market maker or raise capital for a company. Broker-dealers use their account to make trades for themselves or on behalf of their clients.