off course holding bitcoins is a good thing but not holding every coin becasue that is not good for the price increase for us all if everyone holding the price will only drop.
That is the statistic law of supply and demand and yes that is going to happen if all user of bitcoin not spending it either online or offline. The bitcoin will be dropped like a roaler coaster as for the title holding bitcoin for a long time lets say 4-8 years will guarantee your financial issue in the future.