to be honest I not sure how to explain . now we all mining ETH 1.0 , when next update 2.0 , it is auto convert or i need to sell before next update 2.0
You don't have to do anything.
Your 3 ETH will remain 3 ETH after the update.
It's just the upgrade of making Ethereum from being Proof of Work to Proof of Stake.
Thank you very much I feel comfortable now
1- When the Ethereum upgrade to Proof of stake , is cannot mine anymore with GPU's RIG ??
1. Yes, that's right because the confirmation or mining depends on the number of Ethereum your wallet holds. Which means, the more ETH you hold, the better. To learn more about what is proof of stake -->
https://www.investopedia.com/terms/p/proof-stake-pos.aspif yes cannot mine with gpu isn't better now try make big amount and hold it ?
If you have the ability to mine it before the changes, do it.