Differences with Bitcoin:
Blabla.
1. Invest in me, I am BTC I only gain in value. However, nobody actually creates a justifyable increase in value outside of speculation/being told so(150% gainz!!111). It is thus "empty". There is no reason a BTC should be worth something other than people who "believe the story".
2. Get told: Oh sure, cash out anytime you want with the profits made! It's a currency!
3. If all BTC holders were to attempt to cash out RIGHT NOW, there would be a huge percentage that would not be able to find any takers.
4. Different to ponzi in 0 ways.
5.

6. Profit!