Wait, how can bitcoin survive to upcoming crash? Aren't we ones who measure bitcoins in usd? The banking system is really big ponzi scheme and current economy system too, a lot of money isn't moving, is frozen in one place for nothing.
I don't know what kind of crush do you expect in future but if you want something stable, then buy gold. If you want sonething which you can fully own securely, then hold some bitcoins. Some because it's price can become so surprising for you, maybe you'll end up with nothing or with everything.