Everyone is not creative. Everyone can't write, and most can't well enough that anyone would want to read it. Many can't sing, or draw, or express themselves beyond the level of a 3rd grader.
Does our current "fiat currency" "crash every other year b/c of market greed?" Yes, there are ups and downs in the market, but I wouldn't call it a crash.
And while I agree there needs to be a social safety net, people need to deal with change. This isn't a US problem. It isn't even necessarily a problem. All that said, automation isn't free. You can automate lots of jobs, but it may cost more to automate than it costs to pay someone to do it. Flipping burgers can easily be automated, but currently its cheaper and easier to train a 16yo to do it. They can also make fries, take out the trash, clean tables, and do other tasks. All that can be automated as well, but not cost effectively. Now, if we ever get iRobot humanoid style robots for under $100k, that will be extremely disruptive. That's likely at least a generation or more away though.