1. Well, yeah. It's decentralized, no one will pay you dividends.
yeah and i don't like that. 
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However, returns from BTC are much higher than those from stocks.
Not anymore. Bitcoin might have a price change of up to 10% in any given day but I think we would all agree that a price swing of 10% is probably not the norm. It's probably more like between 1% and 2% which is kind of inline with your average stock in the stock market...Bitcoin is up 95% in the past year (despite have just dropped a bunch this past week). How many stocks have had that sort of performance?
Don't know where you got the idea that Bitcoin doesn't grow faster than stocks anymore. Of course it does, and it isn't even close. For comparison, S&P500 and the nasdaq are up 17% in the past year while the Dow Jones is up 11%. Stocks still don't come close to comparing to Bitcoin in price appreciation.