Immutable

Software client that handles storage of cryptocurrencies and allows users to send cryptocurrencies.

A record of financial transactions that cannot be changed, only appended with new transactions.

A Ponzi scheme is also referred to as pyramid scheme, and typically takes the form of an investment scheme which pays existing investors with funds collected from new investors.

A term made popular by Carlos Matos who was the spokesperson for the Bitconnect Ponzi. He used it frequently during Bitconnect events to rile up the crowd.