Earlier quoted context omitted.
This is one thing most people don't understand. If someone is selling you a financial instrument with >6-7% annual returns, it's as ridiculous as someone selling you a time machine or the cure to death. The top 500 companies by market cap don't do much better than 6-7% annually on average.
Take look at Argentina's market. You can get 20% of return on yearly bonds in dollars. Yes, its a bubble but its more mature than any kids ICO
Argentina has basically turned defaulting into a sport [1].
[1] https://en.m.wikipedia.org/wiki/Argentine_debt_restructuring