Stablecoins are a temporary solution for investment plans. Storing value, but cannot be an investment, because Stablecoins will not change its value, because it is always a 1: 1 ratio with a fixed money asset.
That's why I don't keep the stablecoins. About DAI I heard only now. I rarely use USDT and USD too on the exchenges. Mostly I use pairs ETH and BTC. By the principle of cryptocurrency to cryptocurrency.