It certainly does need air and drainage holes. Plant is in good condition.
Best thing to do is find some complete Phalaenopsis cultivation notes on the net written for the Pacific North West.

Is there an inner pot inside the cache pot?

I'd repot it. Phals that are not doing well tend to be what I call the living dead. By the time you see issues it frequently is too late to save it. Be preemptive with phals.