Bitcoin addresses don't expire. Once Bitcoin addresses are generated they never vanish. ... Once Bitcoin addresses are generated they never vanish.
Apart from that, how long does it take for a bitcoin transaction to be confirmed?
10 minutes to 1 hour
Nonetheless, why is my BTC transfer taking so long? Transactions are being added to the bitcoin mempool's full queue constantly. Some may have been sent with higher miner fees than the one sent with your payment. This means that with current network traffic, miners may deprioritize your unconfirmed transaction even if it was sent with an appropriate fee at the time.
So too, how do I transfer Tezos to Coinbase?
Can I send XTZ to Coinbase? Yes, but please be sure to send XTZ to and from Coinbase the same way you send all other assets on the platform, within their own separate wallet to the correct address. Select the "Deposit" button next to your XTZ wallet to view your XTZ deposit address.
What happens if a Bitcoin transaction is not confirmed?
If the transaction receives a confirmation, your wallet should update automatically. If the transaction does not confirm, the funds will be spendable again from the sender's wallet. This may take up to 30 days.