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It is notable that Bitcoin took fewer years than both Google and FB to reach a 1 trillion market cap. Now market cap is a pretty horrible metric (and 1 trillion is arbitrary), but one way to compare totally different things. Note that bitcoin has always been the dominant cryptocurrency, and google/FB were dominant search engine/social networks much earlier than they reached 1 trillion market cap. What took a long time for them was for the market to value those innovations more highly. In crypto's case, the market valuation actually came quite quickly.

> The volatility of BTC/USD has only increased

Do you have a source for this? The data I have seen is that it is just slightly decreasing if anything, but there are many ways to measure volatility.