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?
Don't use Stablecoin as a handle or hope for profit and this kind of thing, because that will be difficult. Because basically stablecoin is just a backup. Only provides convenience for crypto traders. Fee if you want to exchange another BTC / ETH or coin for USD or your country's currency will give a bigger fee, so the solution is this kind stablecoin.