BU does only one thing that Core doesn't, it has a bigger blocksize. That's it. Core can change the blocksize without a fork if we needed it, but we don't. BU's paid terrorist organisation spams the blocks to make us think that we need it. We don't.
If you check altcoins' all time chart you'll see that most of them were sleeping for ages and suddenly woke up recently. When the game is over, whoever has woken them up will put them back into sleep again. So, if you have your profit, don't wait any longer, time to leave.
I heard the owner of the F2Pool claimed that his pool was DDosed because he did not support SegWit. Now he supports SegWit.