I’d immediately go into the basement and start memeing. I have redundant internet connections for these kinds of situations so I should still be able to post memes. I’m locally hosting a Mastodon instance so I can post even if the internet is down globally. I also have a TCP-over-HF setup so that I can post memes anywhere in the world without intermediate infrastructure. If humanity is completely destroyed, I would start memeing and rickrolling on cave walls for future generation
TCP-over-HF is very slow, even with a lot of compression and low resolution the max throughput is about 4 memes per hour. I want maximum distribution of my memes so I wouldn’t use any encryption.