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?
Different traders have different strategies. And the market is very dynamic with many factors determining it's direction.
Just be a flexible trader, that can Adapt to the market flow.