Whenever we think about success in investments, the immediate association or measure is mostly often the financial gains, how much money has been made from the investment, the ROI or even the size of the portfolio, but we often forget to look at a more nuanced perspective of measuring an investor's success, a quality that is extended far beyond mere monetary outcomes, which happens to be the wealth of knowledge and breadth of experience which the investor has achieved throughout their journey.
Take your wealth of knowledge and give me the money (ROI) 
. Every investment targets to generate profits and when the profits and not knowledge. Weather the investment generated profit or loss, the investor will always gain knowledge from the invest in the way of identifying areas of improvement to make more profits and cut down cost. You don't only learn from failures as most people make it look, especially the motivational speakers, learning can come from being successful in business and also from failure. The first level of investment is learning or gaining knowledge. If you do not fail in your investment, you will learn how to invest better. And how to understand where you were wrong. For this, you should always be focused on reading more and learning. If you are interested in investing, it is good for you to know that investing requires patience and knowledge the most. An investor is able to increase his portfolio only when he is inexperienced in investing. Usually, some new investors, when they see a market downturn, sell their investments and later distance themselves from investing. However, if they really make a mistake and there is a recession in investment, they have to be patient and wait for the market to recover. An investor will succeed if he can continue his investment correctly. And during the market downturn, he tries to learn with patience where his investment was lacking.