If every trader had the ability to predict the crypto market with 100% accuracy,nobody would make any profits out of crypto trading.When you trade,the profit you make is some other trader's loss.It's a zero sum game.If you really wanna wait until you gain the knowledge to predict the crypto prices,you will have to wait forever.
In order to have a reasonably expectation of making money on crypto prices, you don't have to predict the crypto market with 100% accuracy. You'd only need to be able to predict the crypto market better than a sizeable number of other people can. E.g. when to get out. So that there is someone prepared to buy your coins when you want to exit.
And, I'm not waiting until I can predict with 100% accuracy. I'm waiting until I believe that I have enough understanding of the market so that the chance of me 'winning' is high enough to make it a rational bet to buy.
I don't know why you say 'every trader'. As being able to make money in zero-sum markets, you need there to be a population of investors who don't really know what they are doing. There is plenty of evidence that there are such people in crypto.