Illiquidity is a real issue for investors - it's when a security or other asset cannot easily and quickly be sold or exchanged for cash without a substantial loss in value. This can be frustrating, especially if you need the money urgently.However, there are some upsides to illiquid assets: they tend to be cheaper than their liquid counterparts, so you may get more bang for your buck; and they can provide diversification benefits since they often move differently from the rest of the market. Just remember to do your research before investing in anything - liquid or not!