I have the receipt issued by coinbase, where I l 'address and the amount paid,:
Paid anonymously through the bitcoin network
so .not to understand that this money has come? thanks for any help, I need to understand
You can search for the address where you have paid those bitcoin using any of the bitcoin explorer one of it is blockchain.info than you can see receiving transaction that is yours and outgoing transaction (red one) you can click on that to see where your bitcoin has end.
You can post that bitcoin address from your coinbase receipt so that we can tell you where it actually end.