Based on your financial expertise, provide your response or viewpoint on the given financial question or topic. The response format is open.

Why diversify stocks/investments?
Diversifying is the first advice given to beginner in order to avoid big loss. For example in 2014 the company Theranos was really appealing before it fail in 2016. So a beginner could have invest ALL his money and lose it. But if he has deverified he wouldn't lost everything. As an investor goes from beginner to experience some still Diversify and other concentrate. Mostly it depends how much confident you are about an investement. If you have 20 years of experience, now everything about the company and you are sure there will be profit you can concentrate. If you are not 100% sure there will be a profit, it is better to Diversify. Diversifying can also be profitating when you loose money: because you will pay tax when you earn money, if you diversify you can choose to loose money in some stock (usually in december) and in this way cut your taxes.