General investment advice is to put like 90% (or more) into ETFs, index funds or low-fee mutual funds. That last 5-10% could be individual stocks if you want to

General investment advice is to put like 90% (or more) into ETFs, index funds or low-fee mutual funds. That last 5-10% could be individual stocks if you want to play around and do research, etc. If someone went all-in on AI companies and a stock market bubble bursts, you're in the "find out" phase. Regarding bubble bursting, there have been market protections put in after 2008/09 so I don't know that we'll see major stock crashes. Its more likely that companies may miss targets, products start plateauing on features, etc. If a crash were to happen, I read in a book (Intelligent Investor maybe?) there are usually macro indicators of patterns to look for, I forget what they are but its things like GDP, jobs, CPI, major indices falling X out of Y weeks in a row and other things like that. But that was all from a book looking in hindsight at prior crashes, prior to 2008 and whatever changes they've made since then.