The only reason to hold Bitcoin is the naive hope that more suckers (not even a better word for them) pay you to hold something they think will go higher (again: suckers)
There are networks that are faster / more secure than Bitcoin and therefore more valuable as usable money (which is what Bitcoin was supposed to be)
Bitcoin may be worth something, but it certainly isn't worth $11k in my opinion since it is just a community-decided value-store currently.
The same could be said for USD but at least USD is backed by the United States.