"The one who knows how to sell is the master" is often said, but I believe more in the truth that "selling at a loss is also profitable".
I have seen too many people have high hopes for a certain currency, but they could have made money, or even made several times more, but because of greed, they turned from profit to loss, and finally had to cut their losses and quit.
Remember, as long as you can sell at a profit, it is the right decision, because it is within your cognition and ability. It does not mean that you have to sell at the highest point.
So, if you are optimistic about a currency, but you are not sure about its future trend, then selling in batches is a good choice. This can not only lock in part of the profit, but also leave yourself some room to deal with market uncertainties.