Earlier quoted context omitted.
I disagree. I use crypto to protect against high inflation in my country and mantain the value of the fruits of my labour. Where does that fit in your categories? Crypto and DeFi have a lot of applications, especially in third world countries with bad financial systems.
Your government has capital controls (mentioned in a different response) to prevent you from purchasing foreign currency. Which makes buying crypto (or stablecoin) illegal online purchase. Illegal doesn't always means wrong or immoral, depends on whether the laws are good or not.
I am buying an asset that is pegged to the USD dollar. That is not illegal neither is buying USD denominated bonds. In fact the goverment even has sold USD denominated bonds.