The Sacagawea Dollar is a gold-colored coin introduced by the United States Mint in 2000 to honor the contributions of Sacagawea, the Shoshone woman who assisted Lewis and Clark during their expedition. The 2018 Sacagawea Dollar is part of the series featuring an image of Sacagawea with her infant son on the obverse, while the reverse showcases various designs that celebrate Native American culture and heritage. These coins are considered collectible due to their historical significance and limited mintage, often sought after by numismatists and enthusiasts alike. The value of the 2018 Sacagawea Dollar can vary based on condition, demand, and market trends.