Who told him that Bitcoin is trying to replace gold!? that man is in serious misconception regarding bitcoin! he don't even know the things he talks about! shame!
That's right, bitcoin is impossible to replace gold. Bitcoin is a digital currency, physically nothing. While gold is a real object, there is a physical. The use of bitcoin is wider than gold, because it can pay for transactions that exist throughout the world at the same time, because it uses the internet and computers or smart phones. While gold, can not be used in a short time because there are regulations.