I don't know about your conspiracy theories but here is mine I have not seen a virus mutate this quick and the out breaks of this virus are never linked to previous one which means there is always a new source for this virus to emerge and that is not natural.
Actually, both nCoV( or Wuhan Virus) and SARS are both link to Human coronavirus 229E, which is the virus that caused common cold, it is believed that somehow the cold virus somehow got mutate in the bat population and some how got transmitted into human.
It is estimated that there are 200 new variation/mutation of cold virus every year. Considering the 229E virus was discovered in the 1960s, there should be around millions mutation since then. And consider only 3 of them SARS, MERS and nCoV (so far we know) cause these epic problem, we are very lucky...