Investing in the Vanguard Total Market Index Fund is what I want to do going forward, but I own shares in a number of individual companies and don't know if I should sell all those, some of them. In varying amounts, I own Apple, Disney, Costco, Tesla, and AOL. I think I definitely want to sell AOL and Costco, because the former has fallen while the latter's been pretty flat. The other three, though, are outperforming the S&P and I, personally, think they each have a bright future.
What are your thoughts? Should I go all in with the Vanguard Total Market Index Fund or hold on to these few companies, at least until they stop outperforming the market?