We see alot of people holding on the the coins they invest in, either they are afraid to loose out on future gains, or waiting for a rainy day when they can cash out, does this not effect the market with so many coins not being traded, causing the fluctuated trade movements, with people mass selling when the market starts to fluctuate?
The answer depend upon your outlook. If you think Bitcoin is an investment , then you can hold it, If you thin Bitcoin is a currency then should can spend it.