No, it needs non-useful computation to make it more and more difficult to mine. This needs more and more power to do. The power wastage is not required, but is a side effect. There are other methods of securing digital currency. Bitcoin should be seen as a proof of concept at this stage, rather than a complete technology.
The problem is trying to prevent concentration of power and ensuring new good faith actors can enter the ecosystem at any time on a similar footing.
The irony is that the more widespread it is, the less likely for any one entity or group of entities to have control, yet the more total power is being consumed.
No, it needs non-useful computation to make it more and more difficult to mine. This needs more and more power to do. The power wastage is not required, but is a side effect. There are other methods of securing digital currency. Bitcoin should be seen as a proof of concept at this stage, rather than a complete technology.
The problem is trying to prevent concentration of power and ensuring new good faith actors can enter the ecosystem at any time on a similar footing.
The irony is that the more widespread it is, the less likely for any one entity or group of entities to have control, yet the more total power is being consumed.