|當然貼這是事後諸葛，千金難買早知道。例如現在看 DIS 大家覺得很厲害，但早個十年即便用盈再表誰看得出他的潛力？又現在 DIS 很貴但會不會更貴？
SOURCE: Warren Buffett’s failures: 15 investing mistakes he regrets
Overestimating select manufacturing, service and retail investments
In his 2015 shareholders letter, Warren Buffett highlighted the depth of Berkshire's manufacturing, service and retail operations, noting that some businesses in the firm's portfolio have poor returns, and he considers those serious mistakes.
"In most of these cases, I was wrong in my evaluation of the economic dynamics of the company or the industry in which it operates, and we are now paying the price for my misjudgments," he wrote. "At other times, I stumbled in evaluating either the fidelity or the ability of incumbent managers or ones I later appointed."
What you can learn from Buffett here is not to jump into investments blindly. If you're not intimately familiar with a company, pass on it or seek advice from a trusted expert.