I personally believe in gold and silver as superior forms of currency to fiat money printed by a central bank. In many ways, cryptocurrencies are proving even superior to gold and silver.
That said, while Ron Paul personally believes in gold, he has always advocated for legalizing competing currencies. In a truly free society, we would not have government setting one standard. Let gold, silver, dollars and Bitcoin all compete against each other in the market. The one that wins will be the one that best serves the needs of those using it.