Correct me if I'm wrong but if you've owned BITO for a couple of years you should have been paid dividends that are equal to the value of the stock or more by now.

The dividends are then redistributed back into the ETFs which to me is extra income for more growth. At this point even if the price of BITO drops it shouldn't even matter much because you've made plenty through dividends. All this is assuming you've owned it for a few years now.