At present: * Bitcoin is doing badly in terms of electricity cost versus block rewards. If it keeps going down, the miners are going to switch off. * All altc

At present: * Bitcoin is doing badly in terms of electricity cost versus block rewards. If it keeps going down, the miners are going to switch off. * All altcoins are doing worse. Because the altcoins are basically alternatives to Bitcoin, but their value has gone down even more than Bitcoin's. (I could be wrong - are there any that haven't, which have non-negligible exchangeability and/or trading volume?)