Sol Strategies, a crypto investment firm led by Leah Wald, former boss and co-founder of Valkyrie Investments, bought validators for four networks, including Solana, for nearly $18 million. The company will purchase validators for the Solana (SOL), Sui (SUI), Monad, and ARCH networks from Cogent Crypto, with the bulk of the funding focused on SOL. Validators are entities that process transactions and help maintain the security of proof-of-stake blockchains such as Solana and Ethereum by staking or pledging a certain amount of network cryptocurrency. Shares of Sol Strategies are up more than 900 percent this year, while Solana is up 113 percent, according to TradingView.