Consistency.
An investor does not leave his future to chance. Also, a good investor never puts all his eggs in the same basket. Besides, a good investor can see the future better than others. If you are investing in cryptocurrencies,this makes you a great investor.
Consistency is good way how to be good investor but we don't know situation on crypto where bitcoin or altcoin on higher or lower price, many time we can't prediction about bitcoin because suddenly can be on up or down.
Consistency is vague with this kind of industry, it is volatile and speculative and consistency seems to be no where. I think you mean discipline? coz it makes the investor good at all times. Imo, all charactetistics is under the discipline, if you have a discipline you have the power to control yourself and able to think more. Imagine being knowledgeable in the market but not discipline to do the actions, for me it all inclined to the discipline.
Just expert or people have much money can playing bitcoin and altcoin price so looks consistency to get much profit with bitcoin and altcoin investment.
We don't have such an expert here. As I have said, the market is speculative so people you are calling "expert" might be just a good speculator, graphs and data is all available in the internet so they could have analyze the market more frequently.