I think if you trim down those trunks, to tighten up the center of gravity, it looks big enough to make a nice vase out of. I'd flatten up the bottom so you can put a tenon on it, trim maybe just the top of that central trunk so you have a flat spot for tailstock support for a while, and with those unruly stems trimmed back, it should have a more stable spin until you get it properly rounded.
Each of those stems, as well, I would plan where you cut carefully, as each one mgiht be enough wood for a pen, or perhaps a finial ornament, maybe even a small bud vase.