Christmas brings cheer, cakes and cozy vibes, but it can also be a perfect time for kicking off investments you may not have considered before. A handful of Bitcoin (CRYPTO: BTC) mining stocks have delivered strong gains this year, making them worth a look.CompanyYTD Gains +/-IREN Ltd. (NASDAQ:IREN)+328.41%Cipher Mining Inc. (NASDAQ:CIFR)+242.89%Riot Platforms Inc. (NASDAQ:RIOT)+33.89%CleanSpark Inc. (NASDAQ:CLSK)+24.97%IRENIREN’s transition from mining to high-performance data centers for artificial intell ...