10 Hottest Mid-Cap Stocks So Far in 2025

5. Riot Platforms Inc (NASDAQ:RIOT)
  • YTD Performance: 27.9%

Riot Platforms (NASDAQ:RIOT) is a well-known Bitcoin miner. This company is heavily focused on Bitcoin, and as with most Bitcoin miners, the returns here are quite unpredictable going forward.

Regardless of the variables in play, I think that it is still worth researching if you are looking for high-risk, high-reward stocks. In 2024, for instance, the company reported a 155% increase in its deployed hash rate. It is now arguably one of the fastest-growing Bitcoin miners. Riot mined 516 BTC in December alone.

All things considered, if Bitcoin soars, Riot could ride that wave in a big way. Conversely, if we head into another crypto winter, Riot’s business model will be tested, and investors could feel some pain.