For a large holding I think gold is a possible answer, also USD is a possible answer but BTC is too volatile for any serious holding IMO, gold price has lost allot in the previous period and some BTC fans point to that (I'm one of them too) but BTC went from $1000 to ~$300 in less than a month before, BTC has great potential but is completely unpredictable.
Well gold has been on a losing streak lately, so there are other investments that are better right now. I can think of any off of the top of my head right now, but PMs such as silver as probably better to put value in right now.
And BTC hasn't gone from $1000-$300, it went $1,200, $700, $500, $250 over a four month period. If you can't choose what to do over that period of time, I'd feel pretty bad for you.