[XorNot]

You still can't call it till they actually go bankrupt. And most of them don't - the underlying business and assets get sold off or absorbed somewhere else. And at the end of the day there's an actual service they provide - value is being created, just potentially not profitably.

Bitcoin is the opposite: what value it had (international transfers for Americans who live with one of the first world's worst banking systems) has been completely wiped out by the cost of transactions.

At the end of the day the hashes are valueless, no one has a product, or designs, or even any useful code.