It is not April Fool's Day anymore but we could still see some good jokes.
Difficult to believe that this guy will just buy that much. Trial version?

It is either he doesn't own 100-500 bitcoins or he doesn't have any.
That is the only option if you are rich.
Or, he could be buying other crypto currencies. A possible theory could be, he sold it now and just waiting for the buy back.
Just a hunch.