Bitcoin (BTC) has historically been the highest-valued cryptocurrency in terms of market capitalization. However, cryptocurrency markets are highly volatile and can change rapidly. Other cryptocurrencies that have been among the top in terms of value and market capitalization include Ethereum (ETH), Binance Coin (BNB), Cardano (ADA), Solana (SOL), and more.
It's essential to note that the rankings and values of cryptocurrencies can fluctuate due to various factors such as market demand, investor sentiment, technological developments, regulatory changes, and macroeconomic trends. Therefore, I recommend checking a reliable cryptocurrency tracking website like CoinMarketCap or CoinGecko for the most current rankings and values of cryptocurrencies. These platforms provide real-time data on cryptocurrency prices, market capitalization, trading volume, and other relevant metrics.