You want to trade while the other folks are looking at their charts because things are more predictable. Which is (for sake of the theory or point) when the most markets are simultaneously open.
You want to have safe, predictable waves to trade in-- like a fish going with the flow of the ocean.
Is this correct or at least somewhat?
Yes some strategies are good for a lot of volatility/traders like trading based on the RSI or on some simple technical analysis.
Some strategies don't do well with a really high change in volume and volatility though too. If a news article mentioning bitcoin gets published at 3pm by an international news agency, for example, you can expect a lot more movement and people in crypto will follow much more niche sources (like certain twitter accounts or alternative media outlets that aren't mainstream - I don't follow either so it's safer to just close a position and wait sometimes).
If you're trying to work this out for yourself you can pick it up by looking at charts.
High volatility and high volume is a golden opportunity. High volatility and low volume is really bad (Sundays are like this in both crypto and forex - most btc crashes are on a Sunday).