For me secret of a successful traders are: patience, knowledge in chart analysis, following update in the coin you are investing and most important is research on the coins your are investing ensure that it has a good product to offer in the market.
That ain't secret no more but what's inside it is where the secret lies on. Patience is already known by at least or supposed to be 100% of the traders in the market, and just by emotional trading, it tends to be forgotten quite often. Knowledge in TA tools/charts isn't that truly or let me say it, fully helpful to your fruitful trading. I think the real secret in crypto trading is predicting on what's really unpredictable, or should I say playing the dice.