Pi is a new cryptocurrency for and by everyday people that you can “mine” (or earn) from your phone. Cryptocurrencies are a new form of digital money that is maintained and secured by a community, instead of by governments or banks. Today, you can mine (or earn) Pi by helping to secure the currency and by growing Pi’s trusted blockchain network. While most cryptocurrencies (like Bitcoin) have been very hard for everyday people to use and access, Pi puts the power of cryptocurrency into the palm of your hand.
It's completely free right now and will be there until the app has 100 million users. After that, it will no longer be possible to dig for free. Then the future will decide whether Pi-Coins will be worth anything. Predicted value until 2025 is between 1-200 dollars / coin.
Pi is a new digital currency developed by Stanford PhDs, with over 10 million members worldwide.
To start mining Pi follow this link https://minepi.com and if you use my username (gadgetzz1) as your invitation code you get a free coin