When we are at Extreme Greed you need to be taking some profit off the table. Most people in crypto fail to keep the money they've made. They either sell too late or they selfishly watch all profits fall back to zero.
If you are a trader and you don’t know when to take profits, then you are hardly going to make profit from trading, because you won’t leave the market when you are suppose to leave, you will want to get more profits, till price of coin start dumping before you will start struggling to sell. Some will lose all their profits and will still lose some of their capital, just because they don’t know when to sell, and mostly we shouldn’t be greedy, always take profits even if it’s small, their is no crime in taking profits. But if you think your profits is too small, and you keep on waiting for it to increase, things doesn’t go as planned always.
I just remembered a similar incident that happened to a friend of mine. Although it concerns him placing a bet during last weekend's EPL matches but the point I want to highlight is how when he had options to cash out, of which may have seemed too small for about 3 betslips that day. He didn't take the offer until it expired and he wished he had taken up the offer, at least he would have had a little profit rather than the loss that befell him that day.
Coming back here and now, while trading, it is a wise move to take the profits that may seem too little, early. It is until one has been in the market for long that they can have the confidence to keep trading while ignoring the small profits on top.
Greed has never been the solution to wealth but its demise.
As it applies to the gambler who didn't take profit early and lost all, so it applies to the trader who doesn't take profit early but wait to keep trading hoping to increase the profit, without a set limit in mind. The crypto exchange market is always volatile and susceptible to change just like same way odds are to a bettor.