Utilize your financial knowledge, give your answer or opinion to the input question or subject . Answer format is not limited.

What happens if one brings more than 10,000 USD with them into the US?
Since all the other answers thus far seem to downplay the risk (likelihood) of the money being seized, I figure I may as well make my comment an answer. Unless you happen to have your legal team travelling with you and your suitcase of cash, you should expect that you'll be questioned extensively, so that any sign of nervousness, inconsistency in your answers or anything you say that doesn't "make sense" to the officer will be used as an excuse to seize your money, and you'll learn an expensive lesson in civil asset forfeiture. The government will file a complaint against your money, leading to a ridiculously named case, such as United States v. $124,700 in U.S. Currency. Worth noting that while the outcome in this case was not in the government's favor, in the vast majority of cases, the government keeps the cash. Between 9/11 and 2014, U.S police forces have seized over 2.5 billion dollars in cash without search warrants or indictments and returned the money in less than 10% of cases.  That last link is kind of a long read, but contains cases where people with completely legitimate money and documentation for their money had it seized anyway, and were only able to recover it after months or years in court.