Value is subjective and varies from person to person. Some people may see more value in gold's scarcity and historical significance rather than its practical uses.
It's incorrect to say that cryptocurrencies have no value beyond trading convenience. Cryptocurrencies like Bitcoin have unique properties such as being decentralized and borderless, making it a useful tool for cross-border transactions and as a hedge against inflation. Additionally, the blockchain technology that underlies many cryptocurrencies has potential use cases in various industries beyond just finance, such as supply chain management and voting systems.
While the value of cryptocurrencies may be volatile, it is important to remember that this is a relatively new technology and the market is still in its early stages. Just like any new technology, it takes time for its value and use cases to be fully realized.