Updated from 6:12 a.m. EDTJim Cramer isn't afraid to tell people to sell or to warn investors about problematic stocks. Cramer is famous for saying, "I'm not about making friends, I'm about making you money." He held true to that mantra this week when he advised investors on the "four horsemen" of tech. Here are some Cramer highlights from over the past week as aggregated from his "Mad Money" TV show, the "Stop Trading!" segment on CNBC and his RealMoney blog posts. Cramer's Indestructible Stock Picks: On Wednesday's "Mad Money" Cramer offered up some indestructible stocks that could make money in almost any economic environment. Cramer's Indestructible Stock Picks including Intuitive Surgical ( ISRG) and Google ( GOOG). Cramer's Four Horsemen Take: On a "Wall Street Confidential" video Wednesday, Cramer said: "At this point, people who didn't get into Apple ( AAPL), Research In Motion ( RIMM) or Amazon ( AMZN) have missed these stories, but what people haven't missed is Google." For more, check out Cramer's Four Horsemen Take. Cramer's Four Stocks to Worry About: On Tuesday, Cramer warned investors about four stocks that could see trouble ahead. In an Oct. 23 blog post he wrote, "Watch Countrywide ( CFC). Watch WaMu ( WM). And, I believe, watch PMI Group ( PMI) and Magic Software ( MGIC). Those are the Achilles heels of the system. They are not getting better. They are getting worse." For more, check out Cramer's Four Stocks to Worry About. Cramer's Mineral Stock Plays: Cramer believes the selling in the mineral stocks is overdone and the group could be ready to bounce. In an Oct. 22 blog post he wrote, "It never stops. We get a couple of articles about how the worldwide economy might be slowing and then everybody sells every mineral stock. Every one of them!" Cramer's Mineral Stock Plays include Freeport-McMoRan ( FCX).