For me, it is depending the purpose that you hold this coin. For instance, if you opt to make frequent payment or transfer, these coins are the best solution: fast, cheap and untraceable. But in the investment point of view, these coins won't give you significant return or any return at all, due to the fact: they are stable coin, they are meant to be stable!
Stable coins are not really an investment opportunity. They are supposed to be stable and not fluctuate much in value. They are mainly a means for investors to hold fiat value without actually cashing out to fiat.