Danger in killing autovacuum: VACUUM queries (to prevent wraparound)

There is an autovacuum query that is taking a very long time to run, and preventing alter queries to run.

What is the danger is killing this autovacuum process before it's done?

PID      QUERY
16967 | autovacuum: VACUUM public.articles (to prevent wraparound)

Here is how I am killing it:

select pg_terminate_backend(16967) from pg_stat_activity;