The entire purpose of fiat was to be more portable and divisible than gold. Bitcoin is divisible enough and infinitely more portable than fiat. Natural selection will eventually make fiat a thing of the past but it may take decades. Government corruption/violence, and public education/awareness are the only factors that can delay its progress.
That's actually not remotely true at all. Notes/coins that stood in place for gold were used just fine under the gold standard and they made the trading the ownership of gold easy. The actual reason the world collectively left the gold standard was its deflationary nature. The world's economists felt after studying thousands of years of human economies that human economies did best with a steady, low, annual monetary inflation of 1-2%, this was impossible to achieve with the gold standard where gold production could not keep pace with the growing world economy so countries left it behind.