[nanny]

>No one is afraid of the ecological cost of crypto currencies ?

I am. But this is a drop in the bucket compared to financial sectors that deal with "real" money. Really, isn't nearly all modern money "virtual"? Nevermind the fact that a lot of money only exists electronically, modern money doesn't actually physically represent anything. Therefore: virtual.

[blencdr]

The problem is not the virtual character of the money, but the energy involved to create it.

The idea behind it is that you need energy to gather money (metalic money for example). but this is pointless for bitcoin, it's just wasted without any utility.