Take 9,900. 10k gets you flagged especially if you are flying international. ALSO have the bank receipt showing you took it from a legitimate bank. Do declare it. you will probably get stopped by TSA and the DEA will get involved. If you have documentation it came from legitimate sources you wont have a problem. If you do not have a receipt you will have a lot of questions to answer and if you are late for your flight you will have issues.