Crypto is an umbrella term for a number of solutions, including blockchains (roughly 1,000+ as of right now) and cryptocurrencies (roughly 22,000+). While a given blockchain may be limited in terms of how much can be 'mined' or grow, you or I could very easily create a new cryptocurrency or even a new blockchain. Assuming we got traction with it, there would now be N+1 more out there.
Gold is not something we can so easily create. It also has intrinsic value through practical applications.