Saving money and Making money

Sacagawea Mule Coin-  Keep a look out for Quarters and Dollars with the incorrect imprint, there have been mistakes,  they are really valuable.  

What makes a Sacagawea $1 coin so rare?
Rare Sacagawea Coins: Background, Appearance & Value Factors ...
In many respects, the Sacagawea dollar is a rare coin. The fact that it features a woman, alone, makes it one of very few such coins in the United States. However, the Sacagawea dollar coin is also rare because of its scarcity. Only 71 billion Sacagawea coins have been minted, and this is far fewer than other coins.Oct 11, 2023