Participating in the creation of the new culture of our time
Argentarii operated at banks known as tabernae argentariae which were set up in the forum. The chief occupation of argentarii was to exchange coins. Permutatio was the exchange of foreign coins for Roman ones, and was one of the responsibilities of the argentarii. They also kept sums of money for other people. Argentarii might be custodians of money in order to pay interest on behalf of those who had entrusted them with the money. While in their custody, the argentarii would use the capital for their own profitable purposes. Argentarii could also act as agents, such as at public auctions. They also tested the value of coins. During the imperial period, the argentarii were responsible for the circulation of newly-minted coins.
(source: Argentarii - A Dictionary of Greek and Roman Antiquities, John Murray, London, 1875)
So if the ancient culture of the first money transactions was born a long time ago around this warm sea, why not participating in the creation of the new culture of our time.