But while stock market investors often race to sell their assets when things head south, owners of expensive artworks who tend to be pretty well off usually don’t resort to desperately flogging their Rembrandts and Warhols for whatever they can get. About Log In. Since the value of the most well-known art tends to rise over time, that might not be quite as crazy a prospect as it sounds. Click the AdBlock button on your browser and select Don’t run on pages on this domain. It goes against almost all investment advice.