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Unlike in farming, you'll be required to have two cryptos.
There are liquidity pools that stable coin pairs though. I remember some platforms even have stable coin to stable coin pair (i.e. BUSD - USDT).
That's right, that's why it's requiring you to have two cryptos for which is needed for you to convert if you want to farm.
I've done that in some pools and farms and I can't say that I'm much satisfied but it's part of the process and letting them grow until the right time come to harvest.
Hopefully that it will be like what I've earned with just holding bitcoin and ethereum.