Energy from the earth's center?

Ok I know we already make energy from the earth like heat from volcanoes and the ocean, but to my knowledge we still haven't digged to the earth's core yet. We still haven't gotten passed the crust even. So what if in the next like at least maybe 50 years we have technology advance enough to physically get to the earths core. How much energy dose the core have and how long could it take to power the planet with it? I'm obviously not a scientist, but I am a guy who this in his head a lot and it could've been our energy source for the rest of humanity. I mean the earth isn't going anywhere until were dead. So what do you think.
Energy from the earth's center?
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