Not that they are biased. Bitcoin is giving higher ROI.
It's a gamble, that what it is and your answer is biased.
It was proven that Bitcoin gives higher ROI than gold despite its high volatility. I do not think the statement you quoted is biased. You can look at the history of price increase or ROI gotten from investing gold and Bitcoin and you will see yourself that Bitcoin indeed gives higher ROI than gold. It is even stated in a study done in this PDF:
https://ebooks.iospress.nl/doi/10.3233/ATDE221051The biggest difference is time, gold is thousands of years old while bitcoin is only a few years old...
With the path it is taking, bitcoin has everything to be a kind of digital gold, so it is up to the person to study the fundamentals and then make the decision that they think is most convenient. For example, I don't buy gold, only bitcoin, because I believe that the ease and convenience are infinitely superior, after all, I'm not going to walk around with gold or keep gold at home, bitcoin is much superior in my opinion.
When it comes to time, of course gold beats bitcoin because gold was already here even centuries ago but bitcoin is just a decade ago. But superiority comes not in time but on its utility case. Bitcoin can be used as a tool of investment and as a digital currency, while gold only focused having as a safe haven investment but when it comes to profitability, bitcoin is obviously superior than gold.
I agree! Bitcoin is more than just a digital gold. The creation of Bitcoin is a revolutionary turn for financial industry. It gives financial inclusion to the poor which gold can't give. It also gives freedom of transfer since its cover is boundless. Gold maybe an advantage because of its tangibility and low volatility but Bitcoin gives easy accessibility and in financial transfers, the more accessible the item is the more effect it can have in economic stability and societal well being.
Regardless, whether to invest in Bitcoin or gold depends on the investors' goal and risk they wanted to get involved. If one wants a less volatile market with high liquidity and minimum possible loss then Gold is a thing for him but if he wants a higher return in ratio to the time span, I believe nothing beats Bitcoin.