All you're really doing here is observing that the 3.6bn poorest people are really poor.
This does not support your statement that "the 1%" owns more than the rest of the world.
However, that statement happens to be true. If you look at the Credit Suisse wealth report that those oxfam figures are cherry picked from, you'll find that the 1% (globally) comprises about half the population of the US.
It's you, in other words.