Pi is a new digital currency being developed by a group of Stanford PhDs.
For a limited time, you can join the beta to earn Pi and help grow the network.
To join Pi, follow this link https://minepi.com/secret0x90 and use my username (secret0x90) as your invitation code.
Hier mal eine Einführung auf Deutsch: https://wissen.fun/pi-network-krypto-mining-auf-dem-handy/