Acropolis - The high point or citadel of an ancient Greek city, like the Acropolis in Athens. It is generally a raised area above the rest of the city where the most important sacred and secular buildings are brought together. The buildings on the Athenian Acropolis were important for trade and worship.
Bitcoin is a digital currency (also called crypto-currency) that is not backed by any country's central bank or government. Bitcoins can be traded for goods or services with vendors who accept Bitcoins as payment.
Related: What is bitcoin? Investors in South Korea and Japan, the two largest cryptocurrency trading nations, were sitting on the sidelines Tuesday waiting for the regulatory uncertainty to clear before placing further bets, said Greenspan. He believes the light trading volume caused bitcoin's price to plunge. Bitcoin approached a record $20,000 in mid-December as it launched on futures exchanges in the United States. But it has since fallen sharply on intense regulatory scrutiny. Related: Hackers take advantage of bitcoin's wild ride