Is the Fiat currency world ending?

I would think that if fiat currency is at risk, people should start thinking about how to do stuff (way) more useful than collecting data and selling ads. These things, for the most part, rely on commerce which relies on stable money.

There's some time I'm never getting back. The link points to a YouTube channel; I looked at the most recent video. It's a montages of stock video of generic stock traders and slick pictures of banks and money, plus bars of gold.

The voice over is a word salad of someone trying to sound smart, but who is actually jumping from one partly explained concept to the next. The video simply ended abruptly without any kind of wrap up.

End result: vague doom-and-gloom about how there will be some kind of financial panic? The most recent video on the channel, BTW, didn't actually use the phrase fiat currency.

This channels list out the dooms day vision of all the top thinkers.

The forecast, FED printing more money in future leading to more chaos.

The conclusion are not great for common folks. What should a Millennial/GenZ do in such an environment?

What are the points which can counter these hypothesis?

What happens to common people if they get true?