Cryptocurrency mining in 2024 is no longer as profitable as before. Profit margins have narrowed and, without access to cheap electricity, an investment in expensive mining equipment cannot be justified. However, there are cryptocurrencies that are still profitable for miners with the right equipment and low electricity costs.

Kaspa (KAS) is an emerging cryptocurrency known for its speed and scalability. Using Bitmain's Antminer KS5 Pro, miners can generate a daily profit of $76.99. Despite the high initial cost of $10,500, the miner becomes profitable in just 136 days.

Dogecoin (DOGE), originally created as a joke, has become a serious contender in the cryptocurrency market. With Bitmain's Antminer L9, miners can earn $17.72 daily. Although the miner costs $6,629, it takes about 374 days to recover the investment.

Bitcoin (BTC), the largest and oldest cryptocurrency, remains a mainstay for miners despite its lower daily profits compared to newer coins. Using Bitmain's Antminer S21 Hydro, miners can achieve a daily profit of $2.89. Given the miner cost of $5,599, it will take around 1937 days to become profitable.

In conclusion, cryptocurrency mining seems to be increasingly reserved for large companies that can afford to buy thousands of cutting-edge ASIC machines and make the economies of scale work in their favor. However, it is important to note that if you already own a powerful mining machine, you can ignore the days to profitability and only consider the profitability itself. This can significantly change the equation and make mining a very viable passive income strategy.