The upstart blockchain Solana, which some have dubbed a potential "Ethereum killer," has raised a large amount of money to scale up its ambitions, which include becoming a go-to home for decentralized applications, or dapps. The project — which is best known for powering FTX's decentralized exchange Serum — could raise anywhere from $300 million to $450 million from the raise, Solana's blockchain promises more scalability through a new consensus mechanism known as Proof of History.