There are many HYIP schemes run on the internet world which promises you mind boggling yield of earning and offers you a very lucrative schemes of making profit of 200 to 2000% and in a short spam of time interval .
Let me tell you , there can never be such business in the entire world to produce such a high margins of profit. These ponzi schemes makes you rich in dreams but in reality when they feel having good number of bitcons in their pocket , they run away with the closing their websites.
Latest example is http://minecloud.io
Its run around 2 years on the internet and earn the public attention and interest but at last they have run away closing their websites.
Other few scams which I could figure out :
All the list of such HYIP schemes are available on the link
http://www.allhyipmonitors.com
Beware of such schemes as they are exist just to do scams and do frauds with public money , with the rising interest of public in the cryptocurrencies , these type of scams would also evolves time to time , but always be alert , simple trick to identify them is not to pay anything to them and automatically they will be exposed themselves.
Be alert !!!!