You can convert your Solana winnings to other cryptocurrencies or fiat currencies. To do this, transfer your Solana from the casino to a crypto exchange like Binance or Kraken. Once there, you can trade your Solana for other cryptocurrencies, such as Bitcoin or Ethereum, or convert it to fiat currencies like USD or EUR. These exchanges offer various trading pairs and withdrawal options, making it easy to manage your funds and convert them as needed.