Maybe a silly question, but if the concept of a stable coin is to maintain market cap (i.e. coin price) by dynamically altering the supply and/or demand. (e.g. Tether, Ampleforth) then what is the potential for a return on investment? For example, if USDT is always about $1 what's the upside of investing in it if the price never goes up?
You're right but the ROI in stable coin vary and require some research to get it because if you buy stable coin through their site(Tusd) they usually give some additional coin if ones buy at least $1000, some the coin surge pass $1 and the early adopter or investors usually have some discount dyrig presale or ICO of stable. However, some stable coin are back with precious metals and they can swap the coin for precious metals.