Technical analysis is not always necessary. It is enough to know fundamental analysis, knowing how to observe the charts to see the patterns and a knowledge of the previous ups and downs. By that much knowledge you know when you can buy and when you can sell. Essentially that is all you need in order to make profit from this market.
I agree with you that you don't needs to know it all before you can make profit from the market as long as you are trading the spot market, since you just needs to buy and wait for it to appreciate in value, and once it does, you sell and make profit, but that doesn't mean that you will buy any coin you see, because you will pay for it dearly if you engage with the wrong asset.
Now if you are looking for those other forms of trading like leverage and futures, even technical analysis will fail because they are essentially gambling.
No, I think you are getting it wrong here, futures or leverage trading are not gambling as you are saying, I did agree with you that knowledge on technical and fundamental analysis are not enough to be successful while at it because you need a combination of patience, self control, taking the right set up only and having the ability to control your emotions while in the market for you to be successful in it, the only way a futures trader can seen like he is gambling is if he is trading the market blind or he is doing emotional trading, because once you are well knowledgeable in the craft, you don't enter the market ignorantly.