Recently heard about the Pi crypto currency. It seems interesting specially since it’s developed by Stanford phds! Feel free to check it out. Currently you can only use by invitation. 

Pi is a new digital currency developed by Stanford PhDs, with over 10 million members worldwide. To claim your Pi, follow this link https://minepi.com/sanman02150 and use my username (sanman02150) as your invitation code.

I heard of this but was not able to install last time I checked because it asked for invitation code. Thank you for sharing! This is supposed to be like the beginning of bitcoin. This digital currency can accumulate value in future as it's already getting popular. And the best thing is that it's free for now.

Not meaning to be the proverbial devil’s advocate, but are these just naysayers or is there any substance to their claims(below link)?

https://research.aimultiple.com/pi-network/

Definitely there are naysayers and yaysayers but the fact that it’s free right now just means there is nothing to lose. You have to use your discretion.