Out of Control Phalaenopsis - aerial roots

[Orchidtinkerer]

a bigger pot would solve the problem but it isn't really a problem unless you don't like the look.
Since it has so many roots it wouldn't hurt to cut off a little of the stem at the bottom but that is entirely optional and not really recommended but this plant looks very strong so wouldn't do any harm if you wanted to trim it to fit a bit better - your choice.

If you do trim it, use sterilized tools and let the cut dry for 24 hours before re-potting it to air-dry the cut to stop it getting infected once potted again