Upbit's 24-hour crypto trading volume stood at $3.79 billion at press time, down 75% from the high of $15 billion on March 5, CoinGecko data show. Daily trading volume on South Korea's biggest cryptocurrency exchange has tumbled 75% from this year's high in a sign that frenzied trading in alternative cryptocurrencies (altcoins) has fizzled and digital assets other than market leaders bitcoin (BTC) and ether (ETH) may struggle to maintain lofty valuations. Upbit, which lists 192 cryptocurrencies and offers trading in 309 pairs, registered just $3.79 billion of volume in the past 24 hours, according to data source CoinGecko.