It's related to the concept of - the idea that you should spread your risk across different investments so you won't be overly exposed to a downturn in one particular area. (theglobeandmail.com)
A lot of people buy 2 - 4 hardware wallets to spread the risk of losing one. (disruptordaily.com)
Rather, keep saving to invest more in the same stocks or spread your risk by investing in other stocks. (profitableventure.com)