Here is a good explanation of the ETH changes. He explains it well. There will be a limited supply of ETH which means the price will be driven up due to demand.
You would not want to sell ETH.
Within the coming months, the Ethereum Network will introduce both the Ethereum Berlin Hard Fork and the London Hard Fork. These non-backward compatible hard forks can be seen as stepping stones for the Ethereum Network on the way towards ”Serenity”, or Ethereum 2.0.
