Are you saying he earned his billions through honest, hard work in just 10 years? Do you really believe that?
There's a state resource that he manages as if it were his own. As soon as that state resource disappears, so will the billions.
Moreover, even if there are actually billions in foreign accounts, they are only his property as long as he is in the presidential chair. As soon as he resigns, the billions will disappear somewhere. And the residences and planes will disappear too; they are all status symbols of the head of state.
What distinguishes Putin from many others is that he understands all this. Unlike Berezovsky, Luzhkov, Mubarak, Gaddafi, and others. As soon as they became illegitimate, they lost a lot of money.
The principle here is: if you have a million dollars, the state protects your property rights. But if you have a billion dollars, you have to protect your property rights yourself.
Whether Yanukovych understands this is unknown. But Lukashenko clearly understands it. In general, over the past few years, the number of people who understand this has noticeably increased, not only among state leaders.