What gives the dollar value?

Could you elaborate on what determines the dollar's value? Is it solely based on the supply and demand dynamics within the market, or are there other factors at play? Do global economic conditions, political stability, and investor sentiment also play a significant role in influencing the dollar's exchange rate? Additionally, how do central bank policies, such as interest rate adjustments and quantitative easing, impact the dollar's valuation? Understanding these factors is crucial for investors and traders to make informed decisions in the cryptocurrency and finance markets.