In this case crypto have to recovered first.In this bear market investors will not show Their interest.if old investors who lost their money they will not show interest.
I don't think the cryptocurrency will be a Ponzi market like what you said. New investors = new losers = new source of "the profit". And this form just happening on Ponzi pattern projects.
But if crypto do something in 2020 then we can see new traders and new investors.
The cryptocurrency can't do anything! The demand of the world will make its value increase naturally, there is no organization or individual can do it alone.