Google market cap
You are right: if the combined value of all outstanding GOOG shares was $495B, and the combined value of all GOOGL shares was $495B, then yes, Alphabet would have a market cap of at least $990B (where I say at least only because I myself don't know that there aren't other issues that should be in the count as well). The respective values of the total outstanding GOOG and GOOGL shares are significantly less than that at present though. Using numbers I just grabbed for those tickers from Google Finance (of course), they currently stand thus:
In a word, no. Diversification is the first rule of investing.  Your plan has poor diversification because it ignores most of the economy (large cap stocks).  This means for the expected return your portfolio would get, you would bear an unnecessarily large amount of risk.  Large cap and small cap stocks take turns outperforming each other.  If you hold both, you have a safer portfolio because one will perform well while the other performs poorly.  You will also likely want some exposure to the bond market. A simple and diversified portfolio would be a total market index fund and a total bond market fund.  Something like 60% in the equity and 40% in the bonds would be reasonable.  You may also want international exposure and maybe exposure to real estate via a REIT fund. You have expressed some risk-aversion in your post.  The way to handle that is to take some of your money and keep it in your cash account and the rest into the diversified portfolio. Remember, when people add more and more asset classes (large cap, international, bonds, etc.) they are not increasing the risk of their portfolio, they are reducing it via diversification.  The way to reduce it even more (after you have diversified) is to keep a larger proportion of it in a savings account or other guaranteed investment. BTW, your P2P lender investment seems like a great idea to me, but 60% of your money in it sounds like a lot. Seems to me the dot com market started around 1990, and amazon is still doing damage today, buying WF, crashing market for blue apron.  Do you think the crypto market is done growing at a market cap of 80B?  Seems to me that's a moderate sized business, while a market aught to be in the trillions. I could definitely see a future where Amazon runs home automation. Especially when you consider 24/7 access to their store and streaming platforms.  That said, I imagine Google will probably repeat history and pivot to business applications. Google Assistant, partnered with Google Maps, could do very well with the autonomous car market. A distributor could handle entire fleets from his phone. "This is a really interesting question and something a lot of work is being done to understand.  I'm going to look at the closely related question ""Do non market-cap etf weighting methods consistently outperform once you take into account their investment biases?"" Let's use revenue weighting as a reason why investment biases are so important.  In revenue weighting, you would own almost no fast-growing tech companies as they generally have little revenue.   This sounds great if we are talking about say Pets.com in the late 90s but you also would miss most of the rise of Google. To believe in these ETFs consistently outperform (adjusted for risk) you would have to have a strong reason to believe that earnings, sales, or dividends are a better predictor of company value than market value.  Market analysts include the above three metrics and many more when pricing stocks so out-performance using only one of the above metrics seems unlikely. There is one caveat to this and that is value and small cap stocks have been shown to give slightly better risk-adjusted returns in the very long run (see Fama/French) and many of these alternative weighting methods will have a value or small cap bias.  First, it is unclear if this out-performance will continue now that it is more widely known.  Second, even if you believe this will continue you can more easily and cheaply get this bias though value/small-cap etfs than these weighting schemes. In the end, the only thing that is perfectly clear is that higher fee investments will generally under-perform." Check out WorldCap.org. They provide fundamental data for Hong Kong stocks in combination with an iPad app. Disclosure: I am affiliated with WorldCap. Google already owns 8% of Uber and would make sense to cover basis.   Google is sitting on $90b with less than $4b debt.  Wanted to provide a source but this is old and indicates 7% but it is 8%.   Best I can do on MOBILE;).  https://www.quora.com/What-percentage-of-Uber-does-Google-own The point of that question is to test if the user can connect shares and stock price.  However, that being said yeah, you're right. Probably gives off the impression that it's a bit elementary. I'll look into changing it asap. "At the bottom of Yahoo! Finance's S & P 500 quote Quotes are real-time for NASDAQ, NYSE, and NYSE MKT. See also delay   times for other exchanges. All information provided ""as is"" for   informational purposes only, not intended for trading purposes or   advice. Neither Yahoo! nor any of independent providers is liable for   any informational errors, incompleteness, or delays, or for any   actions taken in reliance on information contained herein. By   accessing the Yahoo! site, you agree not to redistribute the   information found therein. 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