Great answer to OP's question. Bitcoin isn't currency alone, it's an unique payment method. What kind of payment method gold is? Give thing hand in hand. But what is bitcoin? P2P online transaction which is included in blockchain, protects your privacy and you fully own it, no one can steal it without knowing keys while someone can steal your golds even from your hands and pocket. Years doesn't matter, we were different 1000 years ago, now we are far developed from that era and can say the same on bitcoin, it's far developed payment method and currency compared to gold.