I still trade during holidays and make profit, especially when I know it's a chinese holiday because I am certain that there will be a dump in price, all you need do is to swap your coin for any stablecoin in the market and then swap back to that coin after the dump as occurred thereby making lots of profit for yourself, the crypto market is so fun because you can take advantage of any activity to happening in the space to make profit for yourself.
Are you so sure about this, because china is in a 5 days national holiday now from 1st of May to 5th of May and I have been checking the market and all I am seeing is increase in price of coins, even bitcoin that dumped before then, has already picked up back to its former price and may not dump again because it about crossing the resistance line.
If you are talking about the main holiday which was done some months back, I still didnt see any effect of it on the market, so I really dont know which of the holidays you are talking about. Some of these things might just be speculations and not how the market operates.