I think VR works well enough that it’s not just a fad and once the hardware pricing comes down the sales will pick up to make it more successful. Look at stuff like the GearVR which has millions of sales–that’s due to how it’s <$100 and people already have the phone. But the best VR experience right now is getting a $1,000 PC and a $600 headset which is a lot of money.
The biggest advantage of VR though is that since it genuinely works, there’s enough developer interest to make content for it without the expectation of financial success.
If you want to make profit though, you’re going to have to analyze how many sales you can make and balance your budget for that.