Also don't forget GRC! #Gridcoin is a crypto that rewards you for crunching scientific data through BOINC. While you will have to dedicate some hardware to it, you get the awesome benefit of helping out scientific research in such categories as finding cures for diseases, napping the cosmos, finding prime numbers that are really really big, finding black holes, lots of math, cracking coded messages from WWII Nazi Germany, or even - where it all began - searching for extraterrestrial intelligence. Pretty cool idea.