Closed
Many international markets are closed today, and even those that are open will likely have pretty thin liquidity.
Low liquidity makes trading extremely difficult, even if you're trading something that is open. Digital assets, for example, don't have any downtime and are traded 24/7.
However, even bitcoin is heavily influenced by institutional players, who will more than likely be taking the day off. So hold onto your hats.
The normal tendency is for markets not to move very much, but then could be susceptible to a quick and violent burst of movement. When order books are thin, even a single large order placed on the market can have a very big impact on price.
Here's an example of what happened to XRP last night...