I'm worried for the day people start making deepfakes of world leaders. Imagine the Chinese government putting actual money into making a deepfake of Joe Biden doing or saying something terrible. With the resources of a government backing a deepfake, they could easily make it so convincing that nobody could tell it isn't real.

DNA is a pretty lossy system though. I mean hell, that's how evolution happens. If you wanted to preserve some data in DNA for thousands of years, when you came back to it it may have evolved into something completely different.

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If you were to store it on a USB stick or a hard drive it would last forever provided it was stored properly.