Stupid argument. If bitcoin fails, no one will trust another crypto as store of value again and they will all run into the same political problems at bitcoins size.
Bitcoin can't fail, falling in absolute value while some alt is taking the top spot, without compelling reasons.
Reason why this alt can be trusted and bitcoin not.
#UASF = Make Bitcoin Great Again
If 80% of all nodes will not accept non-SegWit blocks this is an inconvenience for Bitcoin Unlimited miners but nothing more. The 80% nodes can't force anything without miners joining in, and they wont.