Good question.
In truth there is historical context for your question:
Back when then Leofinance, now Inleo , launched wleo on Uniswap as a liquidity provider opportunity, leofinance paid people in ETH who signed up with a Metamask wallet.
This was to lure ETH people into Hive.
Every one who signed up for Hive with Metamask was paid in ETH.
Now the situation is different , but similar.
Now if you sign up with a Dash Wallet, you get paid in Dash.
I suppose that if you wanted to be paid in Dash, you could create a new account with a Dash Wallet.
Now as for Bitcoin, if the time came, where @khaleelkazi and @anomadspul thought a front end which looked like a Bitcoin Commuity Product would lure Bitcoiners to Hive to post, I suppose you could sign up for Hive with such a thing as a Bitcoin Wallet, and then you could be paid, through www.leodex in Bitcoin.