Under the mainnet, there are two phases:
1.close mainnnet and
2.open mainnet( when pi coin will have value, that is, you can sell).

We have been in the *close* mainnet since December last year.
That statement above means that we are moving into the *open mainnet in 2023*

Don’t sell off your hard mined Pi. It will go live and many exchanges would list it. Congrats Pioneers. All the best!