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1. Remember that Bitcoin is still beta software. Don't put all of your money into BTC!
2. "I'm sure that in 20 years there will either be very large transaction volume or no volume." -- Satoshi
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1. Yes, bitcoin and other crypto currencies are still on its infant stage. The market is very volatile and unpredictable. So yeah, you don't put all your money on something that cannot be predicted or has high risk.
2. He wasn't wrong. Like I said, crypto currencies are unpredictable. Hence back then, even Satoshi knew that crypto currencies might fail. It has been almost a decade and we have seen large volumes. But there are no assurance that we will see the same within next decade.
We should remember that the "beta" in the software section is not really about bitcoin but more towards the bitcoin wallet, or the things you use for bitcoin. On top of that, it will never get out of the beta stage, it's an experiment done by satoshi and we are the beta users and that's it, there isn't a full release of it and there will never be one, proven by the fact that satoshi is gone and we do not know who satoshi was, and he can't come back and do something about it.
We already steered away from what he left last, so we are using something better than what satoshi built, and yet still in beta. So do not be afraid of bitcoin because of the beta word.