When investing, there are three things you must always remember and never make mistakes:
Do not blindly follow the crowd when prices are rising. You need to learn to think counterintuitively; buy when others are in panic, and remain calm when the market is overly excited to avoid blindly chasing prices. Get used to looking for opportunities when prices are falling, rather than making impulsive decisions in the midst of crowd euphoria.
Do not concentrate all your funds on one investment. Putting all your capital into a single project carries too much risk; diversifying investments can effectively reduce overall risk.
Do not operate with your entire capital. Full capital operation will make you lose flexibility and unable to respond to market fluctuations. There are many opportunities in the market; over-concentrating investments means missing out on other potential good opportunities, which can become very costly and restrict investment flexibility.