[myuncle (OP)]

Can this idea be useful? A pole wobbling on a huge concrete half-sphere? Can this become some sort of "wave power" at home?

[Bored chemist]

Can this become some sort of "wave power" at home?

No.

[Kryptid]

What is the proposed source of energy causing it to wobble?

[myuncle (OP)]

What is the proposed source of energy causing it to wobble?

It could be people, or it could be wind outside, or a mix of wind+magnets.  What do you think?

[Bored chemist]

What is the proposed source of energy causing it to wobble?

It could be people, or it could be wind outside, or a mix of wind+magnets.  What do you think?

I think there are already much better ways to do that.

[vhfpmr]

What is the proposed source of energy causing it to wobble?

It could be people, or it could be wind outside, or a mix of wind+magnets.  What do you think?

Or to put it another way, what do you think a lump of concrete brings to the party that other systems don't already have?

[Kryptid]

It could be people, or it could be wind outside, or a mix of wind+magnets.  What do you think?

Energy from people is highly inefficient: most of the calories in the food we consume goes into making body heat.

We have ways of harnessing power from the wind already, and I don't see how magnets would help.