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 are only seeing the price in fiat but stable coins are not stable at all when you look at their price in bitcoin, so an easy way to profit from those coins is that when you have a strong suspicion that the market in general is going to crash then you just move your money from bitcoin and altcoins to stable coins, if you are right an the whole market collapses then you saved yourself a lot of money and now you can buy most coins for a cheap price and multiply your holdings of those coins with ease.