Thanks for the warning. But I have made a lot of money ignoring warnings like these. You need a better lawyer before giving up so easy.

1. Bitcoin mining is a service not a lottery. Miners work for a living. They are not just scratching off lotto cards. Nor do they pay to play, which is why a lottery is gambling.

2. Bitcoin mining sustains it's self because it can scale up and scale down. It is like gold mining. We know where a lot of gold is that can't be mined because it is unprofitable. If the price goes up, then it will get mined. Same with bitcoin, if it's not profitable then there is too much supply and mining drops off.

3. Your argument is also true of the internet. Unfortunately the universe demands energy for work.

4. I have no interest in weak PoS systems. The market seems to agree.

Bottom line, it is working and continues to grow.