Why Investment is Necessary ?

In older days some where around 1920, when prices remained more or less constant, even if they did rise, It was just marginally so the impact on the cost of living hardly made any difference so the most of prople used to feel that they were secure.
But, entirely this scenario started changing from 1950 onwards, soon underwent drastic change. Since last ten to fifteen years It has gone up tremendously up. This is inflation which we will Later.
Also compare to income expenses are rising at the faster speed in need arise at the time of sickness, children’s education, and their weddings stc. And one cannot even live happily without sufficient savings or investment that is the main reason why one must have knowledge to investment and how to invest in diversified manners. Thats why i have mainly focused on investment in share market.