The evidence consists of credible cryptocurrency data providers that offer real-time price updates. Source 7 (Coindesk) explicitly mentions tracking lists for 'Gainers' and 'Losers,' which directly confirms that different cryptocurrencies exhibit varied performance at any given time. This concept of simultaneous gains and losses within the market is the definition of 'mixed performance.' While Source 5 indicates a slight overall market decrease, this does not contradict mixed performance among individual assets.