Mining has been less profitable because we're in a bear market. If you're mining coins like Bitcoin, chances are you'll be profitable when the market returns but for altcoins, your mined tokens could be worthless in the coming years as the bear market usually last for years. We have one to two years left of bear market and during this time, the tokens been mined mightn't have liquidity or have less attraction from investors as there are better options with the right marketing been listed on exchanges.
How long will the graphics card last, if it's something you'll need to make use of immediately before it expires then consider selling it out because you'll be in loss when you consider all the expenses to step up a miner to mine some token that the future isn't certain.