I think it's clearly desirable to own both, but if you're looking primarily for safety and stability, buy gold, but if you're looking for investment potential, buy Bitcoin.  Bitcoin's potential is practically unlimited, whereas gold reached about $1,920 five years ago and has more or less languished ever since.  It's comparatively low right now, so it might be a good time to add some to your holdings, but Bitcoin still owns the "moonish" potential.