September 15 will be a most historical day in ethereum because that's the day when ethereum blockchain upgrade their ecosystem and called it"Ethereum merge".
Merge is a basically one time of update in ethereum blockchain this merge change whole ethereum ecosystem from "proof of work" to "proof of stake".
As a investor or holder we can not do anything as a part of upagradation or we haven't any right for it too.
There is no action required to protect your funds or wallet entering and throughout The Merge.
After the Completion of merge, running block chain of Ethereum as a proof of work replace by blockchain as a proof of stakes.
This is only for a staked ethereum, it is expected to be unlocked and accessible once the Ethereum protocol completes its upgrades.
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