Well, I have been at this for a LONG time... and I am definitely a holder.
Why?
The thing is, you can't just hold, you have to pump, in order to back up your holding strategy.
Most times when a coin is released it looks great on paper and function, but a lack of supporting service causes the hold.
For example, I am holding a lot of Burst. I am still hoping a 'cryptothrift' opens up where I can trade for goods/services directly with Burst.
Even if it does, the prices will reflect the risk of dealing with burst, burst is far too unstable, and it's only going down. The store has to find a way to dump real quick. 6 confirmations until you get it to polo may put you at risk, if you would accept the coin at the top buy value. You can hold a stash of burst on polo, but then that's also a risk.
Currently I hold a LOT of 'exchange only' coins.
Yes, and you need to pump. Of course, you don't hold all the burst, so it doesn't make sense that you pump it alone. It would be fair if all holders would participate. I actually made an attempt to pump it along with a few other holders, but somehow I ended up supporting at least 50% of the buy orders, while having only 20% of the coins, in our group. I tried, but did not get much help from the community.