The correct answer to this open question is the following.
I think the values that are common in American culture are the following.
I think the most important one is freedom. Freedom is one of the better-known characteristics of the United States around the world. "The land of the free," as it is said in the US National Hymn. This means so much for the American people and can be considered as a foundation of the country.
Another value is competition. American people are very competitive in many areas. And this can be shown in sports, for instance. American Olympic team always finish in the first or second place in the Olympic games in total medals, and gold medals. This value came from the first American colonies and the need to compete to survive.
Other values are perseverance and hard work to be wealthy. The goal that every American aspires for. Through hard work, US citizens know that they can be rich if they commit themselves to hard work and perseverance.