Fork coins are always free money so I don't have any reason to keep them around while I can just sell them for better projects like BTC and ETH but bitcoin gold and bitcoin diamond are both good projects for means of payment and are still both active, in future there might be a need for them
yes. indeed we should exchange it to the right coin for us as a means of investment in the future. because by choosing the right coins, such as eth and btc, it can provide a return on the investment we make because the value continues to increase.