So I own $1000 in bitcoin but I want to invest the remaining amount to accumulate a whole bitcoin. The prices fluctuates every second so how can I do this on coinbase? I believe this is called a market buy order and I've looked at the steps on how to do this but I think they're outdated or wrong.
Just hold your bitcoin until the price increase so you will see your profit. The price will be like that every day and will always fluctuate. You don't have to worry if the price is down because soon, the price will increase. But if you have bitcoin in the market, I think you can use that bitcoin for trading, and you will have a chance to sell the bitcoin if the price increase, and you can repurchase bitcoin if the price is down. So that will allow you to make more money, and you will also have more bitcoin. But you will have skills to trade because it's not easy to trading.
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.
You can send your bitcoin to the exchanges, and you can choose binance. I think you don't have to invest more because you have a chance to get your money back if you can be patient. Just wait for a while to see the bitcoin price will increase.