Could you tell me once a mining rig is set up and linked to mining pool, is the daily payout in real world currency or tiny fraction of BTC?
This depends on the mining pool where you've connected your ASIC.
- Some directly pay your share to the "worker" bitcoin address that you've used, so in small satoshi.
- Most has a customizable minimum "Auto-withdrawal" feature that'll send to your worker address once it reached that minimum
(recommended to set to a higher value to minimize your number of UTXOs, for cheaper spending) - And some (mainly multi-coin pools) have a built-in exchange to swap them to fiat.
Given the question, I'd assume that you don't have access and setup a Bitcoin miner yet, no?
Because it's should be DYOR first before doing the real thing.
Can the payout link into your coinbase wallet?
"
Coinbase Wallet" app or "
Coinbase" (
Exchange)?
There shouldn't be any issue in the former, in case they locked you up, you can restore its seed phrase to any self-custodial wallet.
If the latter, it's not recommended to send a mining payout to any exchange's deposit address although some of them support it.