One of the biggest issues declared for many cryptocurrencies seems to be that they are 'a store of value that has no backup use', which is also a major complain

One of the biggest issues declared for many cryptocurrencies seems to be that they are 'a store of value that has no backup use', which is also a major complaint about gold, being that so little is used for electronics et al. Naive question: Would copper have been a suitable contender?