What is gold rush? How to use in English

The term "gold rush" originated during the late 1840s and early 1850s in reference to a rapid influx of people into a particular area in search of gold. The first recorded use of the phrase "gold rush" appeared in 1848 in a letter written by a Californian miner to a newspaper in New York. The earliest gold rush occurred in the mid-1800s when gold was discovered in Sutter's Mill in California, leading to a frenzied rush of over 300,000 prospectors to the region by 1852. This event is commonly regarded as the largest mass migration in American history until the Dust Bowl. The term "gold rush" is also used to describe other significant gold discoveries, such as the one in the Canadian Klondike in 1896, which brought roughly 100,000 immigrants to the area, and the Witwatersrand Basin in South Africa, which produced over 60% of all the gold ever mined in human history. Overall, the term "gold rush" signifies a significant and sudden increase in demand for resources or opportunities, which leads to a major surge in commerce, population, and investment in a specific location.