Group 1 - The rising prices of precious metals have led to increased interest in copper as an investment, with merchants offering 1000-gram copper bars labeled as "investment copper bars" [1][3] - Many sellers of investment copper bars only sell and do not offer buyback options, creating potential liquidity issues for individual investors [1][9] - The market for investment copper bars is characterized by a lack of established recycling channels, and sellers often provide vague answers regarding future buyback possibilities [9][10] Group 2 - The price of 1000-gram copper bars is around 165 yuan per unit, with bulk purchases available, but the recovery price for copper is uncertain and significantly lower than the purchase price [9][10] - Experts indicate that copper lacks the financial attributes of gold and silver, making it a less favorable investment option due to its high price volatility and dependence on supply and demand [10][11] - The current surge in copper investment is seen as a speculative trend following the rise in precious metal prices, with warnings that ordinary investors may face significant risks and challenges in liquidity and storage [10][11]