The study had three preliminary findings: (1) the overall cross-return correlation among the cryptocurrencies was weakened from 2013 to mid-2016 and then strengthened thereafter; (2) cryptocurrencies that were primarily used for transaction payment, notably Bitcoin (BTC), dominated the market until mid-2016, followed by those developed for data storage and recording applications, such as MaidSafeCoin (MAID) and Factom (FCT), between mid-2016 and mid-2017. Since then, Ethereum (ETH), alongside with its strongly correlated cryptocurrencies replaced BTC to become the benchmark cryptocurrencies. Furthermore, during the outbreak of COVID-19, QTUM, Binance Coin (BNB) and other cryptocurrencies intermittently replaced ETH to take the leading positions during the pandemic; and (3) centrality measures could be served as a useful feature in improving the prediction accuracy of the short-term cryptocurrency price trend movement.