Since its release in 2017, Dai has been able to keep to its promise of sticking to the dollar exchange rate, which bodes well for its reputation. It has also become more widely used, with the MakerDAO community behind it.
There are a lot of interesting elements behind this stablecoin as a whole. But that being said, no predictions can actually be made. The crypto market as a whole is extremely crowded and volatile. Some even doubt whether crypto will last, though that is a different discussion. While all signs point to positive things, this at the end of the day, is only speculation. The wise thing to do is to keep your eye on the market, and likely diversify, according to your budget and goals.