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Stakenet does it! You can stake your coins with the PC off, and in few months you will be able to stake your coins from the hardwallet Ledger Nano S

To the question in your title, my Magic 8-Ball says:

My sources say no

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Most welcome sir.
Really sir you so great man.
Sir I am your post upvote done.

Why Am I so great? (Thanks for the upvote)

Thanks dear