i'm confused about bit 91, on reddit i read BIP-91 lock-in does not guarantee segwit will be activated unless BIP-91 is actually enforced. what does it mean?? and now after bip 91 locked in price slowly down.
BIP 91 is a promise that miners will reject all blocks that do not signal SegWit i.e. BIP 141. By doing that the 95% support for SegWit will be acheived.
So, yeah. BIP 91 will have to be enforced.