I just noticed that many people are still confused about asset bubbles, so I want to share some understanding I’ve learned from following the market.

What exactly is an asset bubble? In reality, it’s when the price of an asset (stocks, real estate, or even crypto) rises far above its true value. Most often, it happens because investors believe prices will keep going up, so they rush to buy. This mindset comes from speculation—the hope of getting returns quickly—and when everyone thinks the same way, prices inflate in an irrational, unjustifiable manner.

One interesting thing is that the phenomenon of a ภาวะเศรษฐกิจฟองสบู่ (economic bubble) isn’t just about numbers—it’s also about human psychology. From history, I’ve seen that the วิกฤตซับไพรม์ (subprime crisis) in ปี 2551 happened because mortgage loans were issued without regard for borrowers’ ability to repay. People borrowed money to speculate on rising home prices, and when the real estate market collapsed, the entire financial system collapsed with it.

Or look at the วิกฤตต้มยำกุ้ง (Tom Yum Goong crisis) in Thailand in ปี 2540. Interest rates were high, but the real estate market was thriving. Investors saw profit opportunities and all rushed in. When the ค่าเงินบาท (Thai baht) was devalued, the bubble burst immediately. Many borrowers could not handle their debts, and the economy fell into a severe downturn.

If you think about it, bubbles come in many types. They can form in stock markets, real estate, currencies, or even commodities such as ทองคำ (gold), น้ำมัน (oil), and โลหะอุตสาหกรรม (industrial metals). Every time prices rise uncontrollably, conditions can form for an asset bubble to develop.

What’s important is that asset bubbles tend to follow similar patterns. First is the movement phase, when something new comes into the picture (เทคโนโลยี (technology), อัตราดอกเบี้ยต่ำ (low interest rates), new industries). This is followed by an upward trend as investors flood in, driven by fear of missing out. Next comes the excitement phase, where everyone is optimistic and prices reach levels that are unreasonable. When some people start selling to take profits, volatility appears. Finally, panic sets in when everyone realizes the bubble is about to burst—they try to sell everything, and prices drop suddenly and sharply.

Based on my own experience, the factors that cause asset bubbles to burst come from multiple directions. Low interest rates encourage borrowing. A booming economy attracts foreign capital. Scarcity of assets pushes prices higher. But most importantly, it comes down to investor behavior: herd mentality, excessive confidence, and ignoring warning signs. All of these allow asset bubbles to inflate.

Protecting yourself isn’t that complicated. First, ask yourself why you’re investing—are you afraid of missing out or chasing quick returns without understanding the asset? If so, be extra cautious. Also, diversify your portfolio to reduce risk. Limit speculative investments if you suspect an asset bubble is forming. Consider using dollar-cost averaging instead of putting all your money in at once. Keep some cash on hand so you can take advantage of opportunities after the bubble bursts. And most importantly, always study and understand the market you’re investing in.

In summary, ภาวะเศรษฐกิจฟองสบู่ (economic bubble) is a phenomenon that repeats again and again throughout history: it occurs when prices detach from their true value, and when the bubble bursts, the impact can be extremely severe. So what we should do is prepare in time—learn and understand, diversify risk, and don’t let emotions control your investment decisions.