I think Bitcoin is great, and I believe it’s going to revolutionize the way we do finance. Also, it’s not a pyramid or Ponzi scheme, unless you have no idea what those words mean. But even though I own some BTC, I find the current rise in its value highly problematic.

And the energy consumption is a problem. In contrast to Etherum, there is no proof-of-stake in the cards for Bitcoin, AFAIK.