Digital asset treasury companies (DATCOs) are increasingly integrating cryptocurrencies into their capital strategies, with listed firms collectively holding over $100 billion in digital assets as of July 2025. Major players like MicroStrategy and Metaplanet have pivoted from traditional finance to amass significant Bitcoin and Ethereum reserves, with MicroStrategy alone holding $718 billion in Bitcoin. This shift is bolstered by regulatory developments, including the FASB's 2023 fair-value accounting standards and the SEC's 2024 approval of a U.S. Bitcoin ETF. While larger firms focus on Bitcoin and Ethereum, smaller entities such as Bit Digital and SharpLink Gaming are exploring altcoins like Solana (SOL) and XRP through staking and DeFi strategies. However, the use of leveraged capital structures, such as convertible bonds, raises concerns about financial stability. Critics highlight that while altcoin investments may offer higher yields, they lack Bitcoin's stability and are vulnerable to protocol changes and regulatory risks.