The following description of the dichotomy between abstract and concrete may be useful to decide if "my death" is abstract or concrete:
The abstract/concrete distinction has a curious status in contemporary
philosophy. It is widely agreed that the distinction is of fundamental
importance. And yet there is no standard account of how it should be
drawn. There is a great deal of agreement about how to classify
certain paradigm cases. Thus it is universally acknowledged that
numbers and the other objects of pure mathematics are abstract (if
they exist), whereas rocks and trees and human beings are concrete.
This is taken from Rosen, Gideon, "Abstract Objects", The Stanford Encyclopedia of Philosophy (Winter 2017 Edition), Edward N. Zalta (ed.), URL = https://plato.stanford.edu/archives/win2017/entries/abstract-objects/
Based on this "great deal of agreement", since "my death" describes an event occurring to a concrete human being, one can assume that "my death" would also be concrete rather than abstract unless one prefers some other way to make the dichotomy between abstract and concrete.