The phrase "might be unstable" is grammatically correct and can be used in written English.
It is often used to describe a situation or condition that has the potential to change or become unstable in the future. Here is an example: "The company's financial situation might be unstable due to the recent economic downturn."
The concept might be unstable and elusive, but still it captured my imagination.
In addition, we understand that there is an election sometime this year and that the country might be unstable.
(v) Rocks or soils that might be unstable because of their mineralogy, lack of consolidation, water content, or potentially undesirable response to seismic or other events.
A six-story building in Harlem was evacuated last night after city inspectors determined that it might be unstable, the Buildings Department said.
However, previous work has shown that the system of parallel channels created by a longitudinal training wall might be unstable in rivers with alternate bars.
Depth-integrated wave models are commonly used in coastal engineering design and studies of near-shore processes, but the results might be unstable or questionable when overtopping of vertical structures is involved.
The Swedish researchers said their findings suggested that statins could also help when used soon after an attack, when the plaque might still be unstable.
TnPZs might also be unstable in some H. pylori strains due to more active rearrangement-generating transposable elements [16], [17], or to lower fidelity of DNA replication or repair and thus higher rates of spontaneous mutation [55].
Nevertheless, the biodiversity of Stomatopoda is so underrepresented in our study that molecular phylogenetic relationships might still be unstable.
Yet the addition of a bootstrap model selection procedure showed that the MI-5 model might still be unstable.
A military defense lawyer suggested the man might be mentally unstable.
