the reason is the about

The Pi Browser has dozens of Pi Apps and a DNS system for .pi domains. Popular Dapps like the Pi Wallet, Pi Chats, Mining, Develop, KYC, and Brainstorm are accessible by their respective .pi URL field of the browser. 

Pi Browser Features

Decentralized browser
Available on iOS and Android
Access to Web2 and traditional internet
Open to the Pi Enclosed Mainnet
Access to all Pi Network Apps
Pi Directory for easy Pi Dapp searching
Easy domain names with the .pi DNS
The Pi Browser aims to build a more open and direct Pi Utilities platform where developers can create more Pi Apps for Pioneers to use and enjoy in the future. More applications and integrations are expected later as the Pi Network increases decentralization. 

What is Pi Network:
Pi Network is a mobile blockchain mining project on a mission to give everyone access to the cryptocurrency revolution. The project was founded by a team of Stanford University Ph.D. candidates who designed a mobile-friendly blockchain mining algorithm.

Pi Network has evolved over the years and has organized a hackathon, built a couple of working Pi blockchain apps, and is now in the final stages of transition to public mainnet.

Why pinetwork is the future？

1 web2 using http/https which can't resolve security problems
2 web3 using which protocal? i think pi is the protocol ,pi isn't just a blockchain, it's a protocal like http/https which we are using now, this protocol working with pi blockchain ecosystem