Hi Amany,
Some
plants, like the Dracaena marginata, grow ever taller and do not normally put out side shoots or branches. Eventually they do get too tall and may even start flopping over under their own weight.
Changing the pot size will have no effect on the growth rate or size, but it may lead to root rot. Root pruning is used to maintain the pot size of a
plant whose roots have outgrown the pot. But that is also not likely to control top growth or height and is not a solution to your problem.
Pruning or cutting back the too-tall stems is the only solution. The stems can be cut back to any height. Just remember that the new growth will come in just below the point where you make the cut. Thus, it is best to cut lower than you might initially think. If there is more than one stem, you may want to cut back one at a time so that you still have some foliage at all times.
Air layering is a more complicated method of pruning and its purpose is to be able to develop roots on the cut-off portion and propagate another
plant from it. If that is important to you, contact me by email or PM and I will send you instructions on how to air layer.