It is difficult to determine the rarest coin in the world, as there are many factors that can contribute to a coin's rarity, such as the number of coins produced, their condition, and their historical significance. Some of the rarest coins in the world include:
The 1849 Double Eagle - This gold coin is one of the rarest and most valuable coins in the world, with only two known to exist.
The 1933 Double Eagle - This gold coin is also one of the rarest and most valuable coins in the world, with only two known to exist.
The 1787 Brasher Doubloon - This gold coin was struck by Ephraim Brasher, a goldsmith and neighbor of George Washington. It is one of the rarest and most valuable coins in the world, with only seven known to exist.
The 1943 Copper Penny - This coin is extremely rare, as it was accidentally struck on a copper planchet (a blank piece of metal used to make coins) instead of a zinc-coated steel one. It is estimated to be worth millions of dollars.
The 1343 Edward III Florin - This gold coin is one of the oldest and rarest coins in the world, with only three known to exist.