I've been thinking about whether investing in big, mid or small cap companies would be the most beneficial for us. I guess that while picking good investments will involve us investing in different sizes of companies (good investments don't only come in one size), but there may be characteristics of certain size of companies that would fit our investing goals better than others. Big-caps are usually more stable and would be able to deliver stable returns, which when purchased at a reasonable price would be able to give us good returns, but then they are not impervious to competition from the small and mid-cap companies that may grow to overtake it as the leader of their respective industries and sometimes sell at a higher P/E ratio due to their perceived safety. Big giants such as Lehman Brothers have also collapsed in the 2008 financial crisis and may also face threats ......