Grayscale Investments has commended Cardano (ADA) for its flexibility and scalability, following its inclusion in the Grayscale CoinDesk Crypto 5 ETF (GDLC). The ETF, launched in September, features major cryptocurrencies including Bitcoin, Ethereum, XRP, Solana, and Cardano, providing U.S. investors with access to these assets in traditional financial markets. Grayscale highlighted Cardano's proof-of-stake mechanism and its recent achievement of testing one million transactions per second with the Hydra scaling solution. This development underscores Cardano's growing stability and potential within the cryptocurrency ecosystem.