It is not only Argentina, there are many countries are suffering financial crisis such Venezuela and see for the next countries. It is caused of US create a policy and regulation in trading commodity. The president of United State delimits or bound the import commodity and rise the taxation of it. It is as the impact of trading war with China. Argentina and other countries should limit of consuming, and not to buy import things to make the stability of the economic.
Normally, with the whole trade war and external headwinds in most countries, such as US fed normalization, trade conflicts, tapering of ECB and so many other things are actually hitting on some countries that actually cannot be able to stand on their own. Usually, a lot of monetary policies when it comes to fiat on its own have always caused a whole lot of these things, and this was the reason why satoshi came up with this idea of having a decentralized entity in the first place.
I don't think the cryptos are not yet ready to be an alternative when there is economic crisis occurs they might move towards gold or the USD which are considered as the standard value by most of us.
Asides that, creating a new crypto will really not be helpful in anyway and it is not like whatever will be created will end up decentralized anyway as it would only just be the digital version of fiat. Monetary, economic policies and so on, will still always find a way to jeopardize a lot of things as long as it is fiat related. Probably, if the country can get to allow the usage of crypto, find a way to regulate it, get to see a lot of people tending to utilize it to reduce the pressure on their currency and economy, probably that would help.