If I may ask, why will a Federal Government Agency send ordinary 0.00001 BTC into your wallet address, which is less than a dollar just to watch you? Or how much have you got in your Coinbase Bitcoin wallet address or account in total, are they up to 7 figures? (I.e million dollars), Because that's the only reason that might make FBI try to monitor you in other to investigate and know If the money you have were a product of fraud or either money laundering. Hence, inasmuch as the amount sent is less than a dollar, it likely to be a dusting attack. So please be careful, Christmas is around the corner, and as such scammers will try every means to scam people of their hard earn money.