The video contains several assertions.

1. From the perspective of world-systems theory, civilization constantly goes through the same cycles: a new center of global business activity rises, money flows to money, a huge bubble inflates, and soon any production at the center of the bubble becomes unprofitable, and money begins to be made directly from money, through the turnover of various securities. Eventually, the bubble bursts, and soon a new one begins to inflate around a new center. The US will burst as the global hegemon, and China will take the stage.
2. Any attempts to imitate the global hegemon can no longer be successful: it is pointless to try to increase one’s investment attractiveness, open markets, reduce tariffs, and build institutions—it is impossible to break out of the status of the periphery during the inflation stage of a financial bubble.
3. Cryptocurrencies have become exactly the same overvalued financial asset, and when the bubble bursts, they will similarly lose the lion’s share of their value.
4. The shortage of graphics cards caused by increased demand from miners cannot be covered by expanding production because the era of globalization is ending, trade wars are beginning, and the local Chinese market does not need that many graphics cards; fear, honest gamers, you will be stuck with five-year-old junk.

I will answer briefly by points.

1. As strange as it may sound, stocks are not just numbers in brokerage accounts. These are investments that go to the companies that issued the shares, and they, in turn, by no means spend everything on management bonuses and buybacks—some is indeed invested in production, specifically in the periphery, where it is cheaper. At this moment, it is important for peripheral countries to be attractive for these very investments.
2. If it is pointless to imitate the hegemon, then how will a new hegemon emerge? If world-systems theory reflects real processes adequately enough, then someone must launch a new cycle with themselves at the center. This means there is a mechanism for leaving the periphery. And it is logical to assume that for this purpose, one really should not simply imitate the hegemon. One should not imitate the hegemon in its current dying state, but rather look back to the time when it was young and healthy—while, of course, adapting to current technological realities.
3. What does a burst bubble mean? Many companies suddenly lose value and find themselves unable to find a buyer for their goods. Demand is mainly for consumer goods, which become more expensive relative to capital goods. The proud owner of crypto, who previously invested in mining, begins to invest in potatoes, selling first the miners (and they become cheaper), and then the crypto itself (its price also falls). The market becomes saturated with cheap used graphics cards, demand for new ones decreases, it becomes unprofitable to invest in their production, and no trade wars are even needed—gamers are stuck with five-year-old junk. I will only note that miners and crypto will get cheaper relative to conventional potatoes during the deflation stage of the bubble, but relative to a conventional dollar—that is far from certain; it might enter a tailspin of hyperinflation.
4. Will globalization end as a result? For adherents of world-systems theory, it is somewhat strange to discuss this. Where will a new global hegemon come from if there is no globalization? Without it, hegemons will be local. So, since everything goes in circles for you, global trade turnover will not disappear anywhere.

I am not attempting to judge here how correct the theory itself is. The theory is relatively young, more or less explains the observed facts, and makes verifiable predictions. As it becomes clear which predictions turned out to be false, they will either be patched, or this line of thought will be considered a dead end, and a theory based on completely different premises will be used—why not.