so what can we do about it?
If people gave up the mining arms race and collectively decided to muzzle their miners back to say 10%cpu utilization instead of 100%
then diff would drop and the results would be the
same amount of coins and network security but with less electricity wasted.
This is of course will never happen because people can never be nice to one another even if the benefits are obvious.
149 activity and you're saying this?
Any network with low hashrate and low difficulty (which is a result of the hashrate) in an insecure one.
And the lower the dif goes the weaker the network is.