I think Gold is still a valid option, it just depends what we see in the future. The states of Russia and China have bought gold to legitimize their upcoming new banking system that is supposed to rival the swift. However western countries have been giving away gold like it is toxic waste they need to get rid off.

So if you think China and Russia become more relevant go for gold, if you think Europe and the States will even have more influence/power in 20 years go for Crypto. At least that is my uninformed guess.

Also Crypto might be something rather temporary while gold will have value in 50 or 200 years almost guaranteed.