Do you really know what you are talking about?! You are accusing Bitcoin as a ponzi scheme just because of that 200,000 unconfirmed transactions! Those unconfirmed transactions are because of the high demand which causes huge traffic to the network. Way back few years ago, many people were also claiming that it was a scam but look at it now, it is on its way to $20000!
Looks like it's on its way to $15000 now.