i really don't think daytrading is a good idea and generally prefer hodling, but i would try to take advantage of the unexpected situation and just sell. you never know when the coin might drop again so better act quick when possible.
If my coin would increase 40% - 200% in value over one night then I will sell those coins inevitable. Part of the money I would invest in some other perspective coins. This is my way of doing to get an income with perspective for future.