The most expensive coin in the world

The 1933 Saint-Gaudens Double Eagle is the most expensive coin sold at auction.

This $20 gold coin has never been in circulation since President Franklin D. Roosevelt abolished it shortly after the coins were issued in 1933. gold coin standard in the USA. Few gold coins survived the Gold Confiscation of 1933. 

Until 1933, the Double Eagle^** was the heaviest coin with the largest denomination. Contributed to the improvement of the US economy by providing stability and liquidity to the US currency both domestically and internationally and had a significant impact on international trade.  

The obverse depicts Liberty walking forward. In her right hand she holds a large torch and in her left she raises an olive branch. On the left, at the woman’s feet, a fragment of the Capitol is visible. Behind are the diverging rays of the sun. Above Liberty's head is the inscription "LIBERTY". There are 48 stars in the circle of the coin, and after 1912 - 50 stars (according to the number of US states). The year of minting is indicated on the right.
The reverse of the coin is decorated with a bald eagle in flight against the backdrop of diverging sunlight. Along the top edge above the eagle are the inscriptions “UNITED STATES OF AMERICA and TWENTY DOLLARS.” Along the bottom edge is the motto “IN GOD WE TRUST.” The coin was designed by Augustus Saint-Gaudens.

  In June 2021, Sotheby's auction house sold the 1933 Double Eagle coin for $18,872,250. The buyer wished to remain anonymous. Unofficially, the coin was sold for even more. Unofficially, the coin was sold for even more. Due to its special legal status, the 1933 St. Gaudens Double Eagle coin is not always included in traditional lists of the most valuable coins.

The 1794 Flowing Hair Dollar is considered one of the first silver dollars minted in the United States of America. The coin got its name from the image of a bust of Liberty with flowing hair on the obverse. Around the circle are the inscriptions “LIBERTY” and “1794”, separated by 15 stars, symbolizing the 15 states in the union. The reverse of the coin features an image of a bald eagle (the heraldic symbol of the United States) with outstretched wings and a wreath of olive branches, representing peace.
 It marks the beginning of the issuance of official US currency. The Philadelphia Federal Mint produced 1,758 $1 silver coins in 1794... These coins were not intended to be put into circulation. Mint Director David Rittenhouse was to use them as souvenirs for dignitaries. Currently, 130 coins of varying degrees of preservation are known to exist. 

In January 2013, the Flowing Hair Dollar 1794 coin was sold by Stack's Bowers Galleries for $10,016,875. The example sold at auction is in exceptional condition and is considered one of the best surviving examples. The coin has a continuous and well-documented ownership history, which adds to its value. Since 1920, the Flowing Hair Dollar 1794 has had 11 owners and its price has risen from $1,250 (1947) to $10,016,875 (2013). Currently, the owner of the Flowing Hair Dollar 1794 coin is the American collector Bruce Morelan, who is rumored to be ready to discuss offers from potential buyers.

The coin The Flowing Hair Dollar 1794, due to its official legal status, remains one of the most expensive coins sold at auction. It represents an important part of the history of American numismatics and attracts the attention of collectors around the world.