We don't need to invest in both, we just need to invest in bitcoin if we don't have too much capital. Because diversification can reduce risk but at the same time it will also reduce the profit earned. But we don't need to badmouth gold either, that doesn't make bitcoin more attractive or make gold less attractive. Because as you said, gold is still the top investment asset and the most trusted safe haven that banks and big investors still turn to whenever the economy is in turmoil.
No matter what we say, it cannot change the fact that gold is still the best and most reliable asset in the world and is recognized by most people in the world.
Each type of asset has its own pros and cons, no one is perfect or superior to another, just choose the type of asset we like.
We are now very clear that Bitcoin price will keep going up with time and that conclusion is drawn after analysing Bitcoin price pattern for last 15 years. Those who don't have huge capital to invest in gold can go for Bitcoin. I do agree that gold is old and much mature sector compare to Bitcoin and being a Bitcoin enthusiast we must not undermine its value. I am focusing on Bitcoin only and that's mainly because I have develop expertise in it over years and find it easy to handle compared to any other sector of investment.