The idea behind Hodling is great and noble (https://steemit.com/hodl/@biddle/if-the-hodl-method-works-this-could-be-a-revolution-and-hugeeee-chance), but if people don't implement the idea by actually holding onto the coins, the technique CAN'T work, unfortunately. SOOOOOOOOOOOO, the DECISION for any investor needs to be whether they think that enough people will not give into WHATEVER drives them to sell, be it fear, greed, uncertainty, or whatever else.
There are some good videos explaining that if a large investor decides to buy a bunch then SELL a bunch, they can cause a huge drop in price. INVESTORS MUST decide whether they think that these drops are going to make it so other weak-handed investors will dump or those who have already gained a little profit that don't want to lose it will dump.
IF YOU DON'T BELIEVE THAT THE MAJORITY OF PEOPLE WILL HOLD, YOU SHOULD NOT INVEST IN THIS COIN. THE PEOPLE ARE EVERYTHING IN THIS MOVEMENT, SO IF THAT FAILS, IT ALL FAILS.
Diclaimer: not financial advice. DO YOUR OWN RESEARCH, as always. :)