I made a mistake and invested $1000 in bitcoin on the bitcoin app not the bitcoin pro exchange. My plan was to invest a small amount and see that build up but I change my mind and would like to the whole value of a bitcoin which around $7300 right now not just $1000 worth. So how can I do this through the exchange? So now I need to invest around $6300.
I think I'm confusing you. I got $1000 from my bank account and put into bitcoin using coinbase pro. Now I want to put in whatever is leftover to own a whole bitcoin not just $1000 worth.
Then just repeat the process on how you able to deposit your $1,000.
Obviously, you can't buy a whole bitcoin with just $1,000. I don't understand what step you are confused about especially that
"whatever is leftover".
You need to harm again your precious fiat until you reached the amount needed for
BTC1. Anyways, it's not necessary but up to you if you want to push for it.