One reason why people will always consider gold as a better investment option, is due to the fact that it is universally recognized and accepted not like Bitcoin which is still under scrutiny by several governments and individuals and even banned along with other cryptos in most regions currently.
That's definitely one of the factors that make people a bit reluctant to use bitcoin hwever some people actually see bitcoin's lack of dependency on the government to operate is what attracts most people. No one controlling bitcoin and its price and it being decentralized is exactly what people want.