"I'm also interested to know how gold is growing over time? Obviously not as fast as BTC these days but it should be more stable right?"

The value of gold is extremely stable over time. So you will never get rich by holding speculating on gold. But it is a good way to store value longer term, as well as to measure value. So, by trading Bitcoin which goes up and down a lot, against gold, I gradually accumulate gold and bitcoin. If Bitcoin price crashes, since I have been storing gains in gold, it limits my loss.