Save as much money as you can and buy land.
For savings it will soon fail. Urban land value rises with a growing working-population. What are the demographics in your area? In New Zealand we have immigration pressuring land value, however if our economy tanks then urban land values will dive.
For prepper? Good luck keeping your land against your violent neighbours when anarchy hits!
Rich enclaves might grow in value, but you need to already be rich to buy in.
AI?
How many hours do you spend programming? There's a lot of work that AI won't replace: like understanding client needs. Maybe you haven't been through a few past hype cycles? Predictions of needing less developers have been made before.