Not really though
When you're talking about hoarding wealth, the problem isn't just different from hoarding money, it's a deeper and more complicated problem.
Assets in the case of these assholes is ownership. If they just held onto cash, all they could do is buy shit, which isn't really a problem.
What they own is vast amounts of the economy, land, and the labor of people.
They think they own the people as well as the labor and products of that labor. They do to a large extent.
When you start whittling down a tier list of which billionaires are worse than others, and there are layers of shittiness there; it's about their impact and how they wield that wealth as power.