I've killed these before and thought I might learn something if I clicked in this thread, and sure enough, I did. It's been about 10 years but pretty sure I overwatered mine, thinking it was wilting. Never have seen another pretty variegated one like the one I killed to replace it. Obviously no need to discuss strength for this particular plant, thanks again, Olddude.
If you don't want to go to a hanging pot, it's perfectly legitimate to stake "vines!" Wonder if this one will get woody or remain supple?
But under the heading of "in general," it's good to turn plants so they are evenly exposed to light and don't develop a lean. Also, plants that go outside for the summer, or even just to be rained on occasionally, are much more able to hold themselves up because they've had the opportunity and occasion to develop resistance to wind, which equals strength. If the idea is unappealing or impractical, blowing it (from different directions) with a fan periodically, or running a ceiling fan can help also.