Investors have been increasingly viewing cryptocurrency-related stocks as an attractive investment theme. While cryptocurrencies are decentralized, investing in crypto stocks is a centralized way of exposure to the crypto space. The long-term outlook seems attractive for cryptocurrency stocks, and one player in particular that deserves a mention is Marathon Digital (MARA). At the beginning of the year, MARA stock was trading at $10.40. As Bitcoin surged, the stock touched a high of $56.60. Since then, profit booking and some correction in Bitcoin has taken the stock lower to current levels of around $23. As such, it seems that Marathon Digital stock is undervalued.