As in, you have what is considered “alien” technology that’s 100,000 years newer than anything invented or available today. By then, most humans around today are deceased before that’s even invented due to it being beyond our own lifetime. First, it would be studied if anything of that sort is available now or an equivalent but nothing comes close. People may ask questions as to how you acquired such advanced tech.
Governments may force you to mass produce that against your will if the demand is high, but again comes with its own issues: the materials it’s produced from are beyond what we already acknowledge (not yet known until later) but, they may just coerce you to extract such materials and resources. The futuristic technology will look nothing that’s depicted in science fiction, since it’s something we don’t even understand yet.
Sufficiently advanced technology is indistinguishable from magic.
Do I know how to use the technology?
I would hope that in 100k years, assuming humans are still basically human, the tech would be user friendly enough I’d be able to use it.
I’d want to try and improve the world with it. Give free power and clean water to poor countries. Help with medical research.
Hell it might come with a built in library so I can download that to researchers.