Why is my transaction still unconfirmed?

Yes, unconfirmed BTC transactions can be canceled if the blockchain does not approve a Bitcoin transaction within 24 hours . It is considered unconfirmed until at least three miners do not confirm every transaction via the mining process. If you don’t get a confirmation within this time, you can cancel your transaction.

Bitcoin and Security As blockchain is constantly being reviewed by bitcoin users, hacks are unlikely .

Your wallet and any Bitcoin node will show it as unconfirmed, your transaction is stuck in limbo . Block sizes are limited, which means that only a limited number of transactions can be processed in a certain timeframe.

Basically yes. You can spend money one block after you receive it . There is nothing built-in to bitcoin that knows anything about the arbitrary custom of waiting for six blocks in order for a payment to be confirmed. Exchanges may not let you send unconfirmed coins, but you should be able to do it with your own wallet.