If you decide to cash out your Bitcoin using a broker exchange (such as Coinbase), then it will normally take about 1-5 days for the money to reach your account.
How do I buy a large amount of Bitcoins?
There are two options for you to buy large amounts of Bitcoins through Coinbase: One is Coinbase’s brokerage service and the other is Coinbase Pro (Coinbase’s trading platform).
Can you buy and sell Bitcoin in the same day?
Yes, you can buy and sell Bitcoins on the same day. You just need to place the order on the exchange to sell your Bitcoin.