There is some altcoins that doesent require any mining. Please, check out our project:XRONOS. We finished tests of our algorithms (for a year our system worked with dublicates of real market data, but without huge amounts of money), and already have done presale about a week ago. The main idea is a backing of our coins with other coins in different proportions, depending on their share on the market and their prices fluctuations. So it's a sort of an investment stabilization and insurance which will help avoid some separate coins' collapses, and as a whole it follows the general trend of the market (meaning a growth in a long-term, and smaller possible losses in a short-term). Collected data is open and available at stats.xronos.space.