Crypto-currencies are the future. There is no doubt about that, but it will be two steps forward one step back.

Once you have the ease of sending bitcoin, you think that all bank transactions are impossibly hard. Wire transfers? Oh god, please, no.

The important thing to note is that we are in uncharted territories. We have never been in this position before. We cannot study history to predict the future. So, yes, gold has been used as a means of exchange for years (in countries where gold was scarce) but that has no bearing on its future usability.

To me, bitcoin vs gold is a no brainer. Have a bit of both.
If we really go into a SHTF situation with no power, etc, then gold, in hand will be one of the best things you can have. It is also great for bribing border guards.
In so many other situations bitcoin shines brightly.

So, have a bit of both.