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0.6% monthly is actually high and annually that would be 7.2%. Traditional banks usually offer less than 0.5%. A monthly passive profit like that is already good.
There is nothing wrong with positioning that percent and that amount in the place of domicile.
If there is something better than the traditional bank interest percentage offer, why should it be there.
A 600$ monthly income indeed is low but if you don't touch it and let it accumulate over time or buy an asset that increases value like gold or bitcoin then your profit will become bigger. It's a win-win situation and you secured your future since you both have a savings and an investment.
Here I agree, especially if the investment is in assets that are proven to be good for hedging. Even if the return is considered low, as long as it is not touched it will be very good, even though there is a judgment from people that investing in high-risk assets will not really be good. There are even offers to look for low-risk savings such as government bonds.