Well yes and no, they won't keep DACA forever. From research I've done, people I've talked to, including minor inside info here is what most likely to happen.

DACA will get cancelled that is for sure however.

1. In order for them to go after DACA recipients, it will be a very very intense legal process, that requires man power and money and time they don't have. To deport a person is a really complex process.
2. DACA is already in place, it is also not easy to strip privileges like that, yes people say president can just sign and get rid of it, but there is more to that then just signing a paper. Yes when a president signs it, you can no longer apply for it, but there are legal ramifications of leaving over half a million people without work and without food. Before I got approved for daca they were deporting me, but since they couldn't they legally can't leave me without work or any type of way to earn money for food, so they legally have to give me work permit. They also can't say well if you couldn't work and afford food why can't you leave, because a lot of us, can't legally leave the country. Therefore they have to put you through courts, which takes years, etc. imagine half a million of us going to courts at the same time? it will take 5-10 years for each case.

A. They just won't have time to deal with any of it. It would be easier to for now leave it as it is, as far as just keep extending it till they figure sh*t out. OR
B. If they do start cracking down on illegal immigration, since most of us are in the system with no criminal background etc, it would be easier for them to give us amnesty of some sort.
C. When if Trump or whoever decides to crack on immigration big time, that will have to go through congress, and there they must look at people like us. Next time immigration hits senate floor, it will be to crack down on immigration and give us relief at the same time, since this is how it's typically done.

If you look at the history of differed actions, actions like this almost always lead to legalization. Obviously president can't do it, but eventually this kind of stuff will make it to congress and most likely pass.

P.S. It's all guesses, nobody knows for sure, however if we look at what Trump/Republicans say, almost all of them said the same thing. Dreamers must be looked at, but also we must secure our borders at the same time. It will be unlikely for any of us to be deported as long as we stay out of trouble. The path to get our green cards is coming. DACA will go down, but not without us getting something else.