I think the main consideration when you're deciding between bitcoin in gold and looking for a place to store wealth is security. This is where bitcoin shines. It can be stored on flash drives, so concealing it is easier. Also, using offline wallets can render theft impossible (unless someone had physical access to the hardware). The technology behind it is constantly being developed, so there's a chance that in a few years, the original methods developed by Nakamoto could improve with the work of pioneering companies.