>>11232863i'v had mine on display on my shelf over a year and no issues. Tunshi studio blue mary was my first 1/6 scale figure and i'v had her for 2 years no issues(apart from the split elbow). on both my figures it is a minor split but once the arm goes back to a neutral pose you can't notice it.
Other collectors have said don't keep the figure exposed to heat & sunlight to avoid damage the same with plastic figures.