The only reason BTCcore is still surviving is because it is the main trading pair since inception. Core chose the road to profit over useability. Hodl, Seg and LN = litany of failure.
If BTC has an actual use case it's that it's the on-ramp to speculating on alt-coins and ICOs. Every time a usd/alt pair gets listed on a big exchange BTC gets that much more useless.
It gives such awesome peace of mind to not hold BTC :)
