"Imagine" is the name of a song by the late John Lennon. 

It has a soothing melody and is one of my favourite songs. 

While its lyrics may cause a stir among some groups, there's a thing or two which we can learn from "Imagine", such as living in peace with others, not to chase a materialistic life, etc. 

​​​CONCLUSION:

One must also "Imagine" when making investment decisions. 

Although one has to be realistic, one must imagine the potential gains and probable losses one could get before clicking on the "Buy" button.