Probably they wanted more, simply as that, people tend to be greedy most of the time that's why they don't want to sell when they are already in a big profits. So it's a gamble for them, they could win and grow their investments more, or lost it when the price goes down, that's how the market works so I guess everyone knows that. So for everyone, it will be a very expensive lessons to learn, not taking profit when you have to and keep on waiting for the price to still go higher.