Nice healthy looking den. You could easily make 2 out of that pot. I would divide where the half is growing sideways and stake both plants to keep the growing straight That would help with the tipping. But if you like the free form growth you could just place the whole pot into a larger wooden basket and add some lava rock around it. The den would eventually grow out of the pot and take over the basket too. The basket has a larger base and less likely to tip over. I keep a lot of my clay potted chids in baskets just to keep them from tipping over.
Orchids are like velcro! No matter where I go, some follow me home!!