In my opinion, the 1% traders that remain profitable are traders who are passionate about trading crypto, who always learn from their previous mistake, control their emotions, never panic sell, have a reasonable stop loss strategy, never follow hype and know how to select good coins.
Isn't that also about skills & experience which can be learned by you, me, or anyone else reading this? Besides, it's not only about crypto trading, but trading overall - equities, FX, crypto, derivatives, just anything.
Yes, it is. The strategy I mentioned can be used to trade in other patterns of online trading or investment you mentioned but you can't compare them all to cryptocurrency because crypto is volatile, only traders that have already learn how to maximize their profit over the loss and also seize every opportunity presented by the market can trade crypto.