first of all, Investment is a completely personal thing that where a person should invest, But in the stock market it is very necessary to versatile your portfolio by investing in various industries,
never put your all money in one industry if you do this it will be very dangerous for your investment, Just imagine that you chose the best company in a particular industry like (HDFC bank and ICICI bank in the banking sector) but what will happen if the banking sector will slow down for a couple of months although you select two different company but still you will make a loss and stand with a non-profitable trade due to this a smart investor never put his all money in one industry.
