A bubble burst is an event that makes many investors panic, because it often comes with massive financial losses. It is not unusual; markets have a long history of bubble bursts—both in the stock market, real estate, and even digital currencies.

The causes of a bubble burst are actually simple. When asset prices rise rapidly beyond what their true value should be, people start to see it as a golden opportunity to make profits. Everyone rushes in. As demand increases, prices keep rising, until they can no longer be sustained.

Looking at real events, what happened in the United States in 2008 is a very clear example. The real estate market surged because banks approved loans for people who could not afford to repay. People borrowed money to buy homes—not to live in them, but to speculate. Financial instruments linked to these loans spread widely as well. When borrowers began to default, the entire system collapsed. Massive bad debt totaling 15,000 million dollars was revealed. This crisis shows that bubble bursts have an impact on the global economy.

The same thing happened in Thailand during the 1997 period. Interest rates were high, foreign capital flowed in, and the real estate market boomed. Investors saw an opportunity and poured in enthusiastically. When the baht depreciated, foreign debts rose sharply, and the bubble burst. Real estate prices fell rapidly, and those who borrowed large amounts could not repay their debts.

Bubble bursts come in many forms. It is not only real estate. Stock markets can also experience them. When stock prices rise far beyond their true value, a stock bubble can form. A credit bubble can form when lending expands rapidly. Prices of commodities such as gold, oil, and industrial metals can also rise in an irrational and unreasonable way. Even digital currencies are not exempt.

In fact, bubble bursts are caused by multiple factors. Low interest rates stimulate borrowing. New technologies excite people. A strong economy pulls capital in. But psychological factors are the main drivers: fear of missing out, herd mentality, and the belief that prices will keep rising forever. These things cause the bubble to inflate continuously.

The process of a bubble burst has five stages. The first is “movement,” when something new enters the market—new technology, new businesses, or low interest rates. The second is the “uptrend,” when investors rush in because they fear missing out, and prices rise. The third is “excitement,” when people are overly optimistic, believing prices will increase forever. The fourth is “profit-taking,” when some realize prices are too high and begin selling. The fifth is “panic.” As more people realize the bubble has burst, everyone tries to sell at the same time, causing prices to fall rapidly.

So, what can we do to protect ourselves? First, ask yourself why you are investing—are you afraid of missing out, or are you chasing returns without understanding? If that’s the case, that’s a warning sign. Second, diversify your investments. Don’t put all your eggs in one basket. If a bubble bursts, at least you won’t lose everything.

Limit speculative investments. If you suspect a bubble is forming, reduce exposure to high-risk assets. Invest gradually, not all at once. Dollar-cost averaging can help reduce the risk of buying at the highest price. Keep cash on hand. When a bubble burst happens, having cash allows you to take advantage of opportunities to buy at lower prices.

Most importantly, knowledge matters. Follow market information, do your research before making investment decisions, and use good analytical tools to help you see trends and warning signals.

Ultimately, bubble bursts are part of market cycles. They happen again and again throughout history. What we should do is prepare ourselves, diversify risk, increase knowledge, and remember that investing always involves risk.