Stop listening to stuff like that which isn't rooted in reality. Your life will be much, much better. :)
The summary of most videos along that path can be summed up as, "Infinite exponential growth on a finite planet is going to run into problems at some point." The details vary, the timelines vary, but that's the core of it.
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I haven't seen that specific video (and generally prefer to read things over watching video, just as a personal preference for how I let things filter into my mind), but I'm quite familiar with the concept, and am working towards making my early retirement robust/resilient/anti-fragile against such things, where I can.
My wife is fully onboard with this, and tends this way as well, so there's no conflict there.
What this looks like is that while I do invest in some market stuff, given a choice, I will invest in useful tools/equipment/skills to make me more anti-fragile going forward, and will do things with an eye towards future use in a failing economy/long term collapse situation.
So, when I put solar on my house (hopefully next year), I'm not going with the standard microinverters, which are ~useless in a grid down situation. I'm going with string inverters that are capable of handling battery backup. I probably won't install batteries initially, but I want the capability, and I'll get a transfer switch wired in as well. This also means I need 240V output so I can run my well pump, and I'd like enough surge capacity to start and run my heat pump if possible.
It will be slightly more expensive than micro inverters, but radically more useful if I find myself needing to run grid-free for a long period of time (or, potentially, hook up with other neighbors to create a small micro-grid for the area).
It means I'm going to be focusing more on gardens and greenhouses than markets, when picking where to spend money. I intend to do some fairly substantial raised bed gardens, and an aquaponics greenhouse - I expect there will be several years of learning curve involved, and I'm fine losing money through those years on it to gain the experience and become an expert in such things.
And chickens. Because hopefully they're able to do something about cheatgrass and turn it into eggs and fertilizer. If you've never had house-chicken eggs, you're missing out.
I'm planning on doing some work with heavy thermal mass rocket stoves (mostly to heat my office and the greenhouse) - so I can find out what works well and what doesn't. Being able to very efficiently use biomass for low grade heat (and possibly cooking bread or other food) is important to me.
I'll probably find a way to dig in a root cellar for longer term food storage. Which... will be a challenge, given how much basalt I have to work around. It may be bermed. I'll probably dig it by hand, because I'm stubborn like that, and could use the exercise.
It also means that I have some non-optimal-return investments/hedges. Metals, bitcoin, etc. I'm diversified to try and be able to come through a wide range of possible future disruptions with at least some useful wealth stored. An awful lot of this forum is incredibly vulnerable to either hyperinflation or a severe market crash. Most people view that as unlikely, I view it was likely enough within my intended lifespan (another ~60 years, God willing) that I should defend against it. Not with everything, but with at least something.
The long term goal is to have the knowledge and built up infrastructure on my property to be able to live very, very cheaply if we have to. I'd like to be able to have enough useful and highly local knowledge that I'm of substantial value to the community around me, both in terms of immediate food production, but also in being able to help people get gardens and the like up without as much of a learning curve.
If I'm wrong? Oh well. I eat well, have interesting hobbies, and between low cost of living and investments, have more money than I know what to do with. We'll probably travel more, pot about the country via either 5th wheel or small airplane, and generally enjoy life while spending very little.
If I'm right? It'll suck. But I'll be better positioned than a lot of people to deal with it, and will have the knowledge to help my local community at least survive, if not thrive. If that's looking likely, I can expand my operations out along some family owned land on the hill we live on, and I've got direct access to quite a few acres I can start working on. If that's the case, I expect I'll have no shortage of local labor I can rely on as well.
It's not the common path on this forum. But it's one I've seen a few other people talk about, and it's the direction I'm going.