LTC and ETH have been done successfully, this is no doubt, but if you want to gain more returns, then invest in some altcoin and ico project, simply by LTC and ETH yields are too low.
I would like to make a survey of investors success in ICO's vs post ICO.
Waiting for Global Jobs coin to hit an exchange, and might take part in the gameFLIP coin ICO, as these 2 coins are based on existing businesses, and have a use in their businesses. JobsToday of global jobs coin is a fast growing business, grew at 500% last year.