Why specifically 11500 ? I checked the resistance levels at 11.5k wasn't one of them, we have some around there but not exactly there.
I think the 11.5k+ is a good mark but exact price is weird, if you said "over 11.5k" I would have agreed.
It's just an approximation. It's in the area of the monthly pivots from Feb-Mar 2018. Price often falls short of the actual resistance level by a little bit. Sort of like when BTC topped out at $9,950 last year, just shy of the $10K psychological level.
That's why some people are predicting targets like mid-$9,000s instead of the actual monthly pivot ~ $9,950. As far as profit-taking levels go, it's a safer bet.