"PI" is a new digital currency developed by Stanford PhDs, with over 9 million members worldwide. It's block chain is similar as BITCOIN. So the future is as bright as bitcoin. To claim your Pi free of cost, follow this link:

https://minepi.com/rok31rohit

And use (rok31rohit) as your invitation code. It's a another golden opportunity .guys don't waste it as there is no investment need .you can mine freely by your mobile itself .