I don't see the possibility of cryptocurrency being more valuable than gold anytime soon. And the reason for that is because gold has been around for a very long time, and it has been the major measure of value worldwide.
Gold is a real precious metal and has always been a benchmark in creating money, but on the other hand Cryptocurrency has a real digital thing that can be seen via the internet and this is not owned by Gold, so the benchmark is valuable or not it really depends on where it is too