That appears to be an incredibly classy thing to do, at no small risk to himself. The billionaires have the most to lose with any social unrest, and he exposed himself to support the masses. If so: Respect Counter-possibility: it's a CYA maneuver, which supports both sides simlutaneously and either message can be declared as "intended" post-hoc.
Agreed he has put himself in more "danger" by this action, but billionaires like him certainly do not have the most to loose. He will have investments, properties, friends or family outside HK. He can simply pay his way to citizenship in most countries around the world. The average HK citizen has everything to lose, their rights and way of life. He will loose some money and property at the most, depending on how he d…
A billionaire has the greatest potential for relative change from the consequences of their actions. They have more chips they can put on the table and thus they can experience a change in fortune larger than others.
At the same time, the poor have the greatest potential for suffering. With fewer chips to put on the table, they are much closer to getting kicked out of the game entirely.