A zero at the end of the year belongs to Pluto — the sign of the hidden and the hard to explain: secret knowledge, the occult, whatever goes on beneath the surface of events.
The defining trait here is force of impact. Around such a person the state of things changes quickly and visibly: one thing collapses, another appears in its place, and often without any conscious intention on their part. That same quality makes Pluto one of the most fortunate signs for running a business of one's own: where others need a run-up, Pluto gets going from a standing start.
The reverse side is exactly the same thing. The energy that moves things breaks them just as effectively — relationships, agreements, one's own undertakings. For Pluto the question is not whether there is enough strength, but where that strength is aimed.