Don't buy anything for a while. Let the supply settle down.
If it were me, I would then (not now) get the AK and some ammo, and start saving my money for a Mosin!
History fails to record a single precedent in which nations subject to moral decay have not passed into political and economic decline. There has been either a spiritual awakening to overcome the moral lapse, or a progressive deterioration leading to ultimate national disaster.
If you think a strong military is expensive, think about what a weak one would cost