If you want to stay in the business you need to adapt to the market demand and make your product and service relevant. I will give you some examples, how big businesses failed when they were unable t stay relevant. Blockbuster was the biggest video rental service, but they didn't switch to streaming like Netflix did. They refused to buy Netflix when they had the chance and ended up going bankrupt in 2010. Nokia is another company that failed because it didn't adapt to the new market. It was the biggest phone manufacturer but it refused to launch smartphone, thus, lost its market share.