Maybe there is something we are all missing here, as to the reason they need the money.
We all know that they make investments, we do not know what kind of investments. If they have had excess money in the past and intelligently invested this money, then that is fine I do not think anybody will find that bad or dishonest.
But what if they speculated with the money? that's a different matter. Just simply moving the money to another currency can be dangerous. In January the US$ gained 25% (briefly) in a very short space of time against the Swiss Franc due to a decision made be the Swiss Central Bank. This resulted in some hedge funds loosing a lot of money, so the question in my mind is, where does the Watchtower have its funds parked?
With some types of investments (speculative), the investor must inject even more money if there is a significant movement in the wrong direction.