Thank you for the references although it's unlikely that I will watch 90 minutes worth of video, no matter how interesting they might be. Again, there is more to Bitcoin than a simple Ponzi scheme. The original Bitcoin whitepaper is public, the Bitcoin software is open, thousands of eyeballs have looked at the algorithmic core of Bitcoin and deemed it technically sounds, so part of its current dollar value is based on that transparency. The hard part is figuring out how much of that value will it retain once mining is capped, but in essence it's more than a Ponzi scheme. Proof-of-Work is proving environmentally disastrous, but it anchors the Bitcoin value in more than quick gain hopes which is Ponzi schemes sole and only value.