What is the definition of an opportunity cost?

In the last year, #Bitcoin is up 105%. #DigiByte $DGB is up 6%. $DGB is down 95% from its USD high, while Bitcoin is only down 14% from its USD high. 

Some people chose #DigiByte over #Bitcoin. Can you imagine being that stupid?
#Bitcoin #DigiByte #DGB #DGB #DigiByte #Bitcoin