Xapo bitcoin transaction stuck
Where did you send the bitcoins from? Anyways, due to the many unconfirmed bitcoin transactions in the network right now, your fee is relatively low and it therefore takes so long to confirm. If you did send them from a wallet you control, then you can try to use RBF or double-spend it with a higher fee. Otherwise contact the sender of the bitcoins, or wait some more time for it to confirm. 

See also here:
Why is my transaction not getting confirmed and what can I do about it?