If we compare the situation in Zimbabwe, it is similar to Venezuela
Actually, As Venezuelan I am pretty sure that our case is quite different from what is happening in Zimbabwe. They had banknotes of trillions of dollars; we removed 14 zeros to our currency: 3 on 2007, 5 in 2018 and 6 in 2021.
Our inflation has slow down significatively and thus we still use our local currency, together with USD, for example.
And we indeed have quite an important volume of crypto-currencies and Binance is becoming a very common custodial wallet to pay for goods an services with stablecoins.
The use of gold will be good because they do not have an official currency, and therefore it will relieve pressure on the government, but how will gold be ensured? And how to ensure that fraud does not occur?
In my oponion if they plan to literally mint gold coins for circulation, that could create a challenge when comes to preventing counterfeits. I believe it would be enough and easier to relauch the national currency, using bills which are extremely difficult to counterfeit and peg the currency to the gold within the national treasury.
Crypto-currency as legal tender in such country with infrastructure problems and probably difficulties to access to internet sounds uneffective, at least for now.