Realistic is completely up to anyone to guess, isn't it? Even if it gained $1k every day from today, 30k would be out of reach, and Bitcoin's only gained that much once in the past week. I'd not put it down as an impossible event, though, at this stage I am beginning to think there's really no rationale to Bitcoin's price, especially with this psychological desire to end 2017 on as high a note as possible.
Just to illustrate, last week's future trading didn't seem to do much even with the compounded week of South Korean regulations. If anything they both served to pushed it even higher, with the week seeing new ATHs. but I wonder if CME carried a lot more weight. Cash-settled futures shouldn't have had any effect, but BTC shed off the same 1k it gained 2 days ago so.