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By the way: this is not financial advice! Although me and 5 of my friends, who all live in the same city, have very good experiences with mining Helium, you do have to do some research and you need a good location to place your miner. You can see the Helium coverage map right here; as you can see, America, Europe and China have by far the most hotspots and, consequently, the best coverage and earnings. I've included some videos for you if you think this is something you'd like to get started with. And if you think you're too late, keep an eye out on Helium just the same: they're planning to expand their network into a people powered 5G cellular network service as well.

Dear @zyx066, Do you mean that mining cryptocurrency with a helium miner is more profitable than mining cryptocurrency with a graphics card?

It can be very profitable. Take a look at their website and look a the map of active miners. You can then zone in on any of the miners and see how much they are earning :-)

Sounds good...I'm still waiting for my Nebra Miner...it's been months and months and months of waiting...I almost forgot about it! That's probably what they are hoping. the dates keep getting pushed out...sigh...