they'd still be able to tell the money was converted to monero, even if they can't tell where the monero went. i would buy $1,000,000 off an exchange (the only one i know is coinbase, but coinbase sucks, so if anyone knows a better crypto brokerage, please let me know.), move all the crypto to a private wallet that is secure that i have tested before to make sure i can unlock and move crypto out of (do not use bitcoin core. i recommend electrum as your bitcoin wallet. you can't even access the wallet at all unless you know your password, while bitcoin core only requires a password for sending crypto, and bitcoin core doesn't give you your private key mnemonic.), then go on trocador.app through the tor network, and then convert the bitcoin to monero, with the monero going to a monero wallet i have stored on a tails os laptop that i have the private key mnemonic for copied onto multiple pieces of paper stored in various locations.
United States