Nevertheless, it is better to ask this question to the miners. The advanced miner can accurately consider the cost price. Then you can talk about overbought or under-sold BTC.
That is a very good way of seeing things. As a matter of fact, savvy miners are the ones who have these kinds of answers. Do you think It is overbought or under-sold?
That still depends,the cost of electricity is different everywhere.
Someone might be able to make a bitcoin for 50% less of the costs that someone else has for example.