Providing your personal details for KYC, I think is not safe, because your privacy is no longer protected. So i think we should avoid it...

Of course, it is not safe if follow the KYC procedure in any platform. Sadly, sometimes we can't avoid it, we must do it if we want to use the platform. In Binance, we must also follow the KCY procedure if we want to trade there. Although it is very risky, I still do it because I think Binance is quite trustable. You must know that everyone must expect to trade in the number 1 exchange in the world (Binance).

It's true that the price of Bitcoin has finally reached a new ATH of $70k, but don't you think there's anything strange when you see the new ATH price after a long wait of around 4 years only at $70k? I see the price of Bitcoin every 4 - 5 years making a new ATH with a high distance that is quite far away, so it seems impossible if the price of Bitcoin just stops at $70k.

What is strange with the new ATH? Sure, it won't stop at $70k. It is just the beginning of the high pump of Bitcoin price. People predicted the price of Bitcoin will be above $100k. And I believe with the prediction because it is not so far from the current price. But I don't want to believe the prediction of people that Bitcoin will be above $150k. I think it is too high target for Bitcoin to be achieved for now.

What if I am not greedy, but have set a plan when I would sell? For example I have bought Bitcoin when the price was $10k. $70k is a solid price to sell. I would have even sold it at $50k. x5 is more than enough. But what if I dont need $, want to keep Bitcoin or my plan (even if it is ridiculous) is to sell it $1kk ? Should I change my plan and sell then? Of course no. In my situation, I would sell it whenever I feel I want to sell.

Sure. The target to take profits will totally depend on the individual. $70k is very good price to sell the Bitcoin if you bough under $20k in 2022. You already get very satisfying profits at $70k. But because it is very possible to reach $100k, it is okay if you want to continue holding the Bitcoin. You can change the plan if it is necessary, but it depends on the situation. But if it is not urgent, you can continue keep holding until $100k.

Having a target profit in trading is important, but a trader cannot have such a plan. In addition to this, it is also important that we do not lose control of our emotions because when this happens, it is for sure that instead of gaining profit, we will lose because of this matter.

because it helps a lot when we have proper control of our emotions we can't be without emotions when we do actual trades on a crypto exchange in this field.

It is a must to have a target for taking profits. It is impossible for someone to invest without a target. However, the target for taking profits won't guarantee anything. It the holder has no strong mentality, he/she can sell the coin before it reaches the target. That's why it is important to have good mentality as a holder or an investor as well.

Controlling emotion will be easy if we have knowledge and experience. We must ensure that we invest in crypto after we have sufficient knowledge and know the experience of successful people. This surely helps a lot for our investment.

Regarding KYC, we should not just share personal IDs, check their reputation. If the exchange is reputable, we provide KYC safely, but for new exchanges, it is best not to do KYC. This is very dangerous.

Although it is a very reputable exchange, it doesn't mean it is 100% safe to share our private data. Even if in Binance, I'm not if our data is guaranteed to share with them. However, sometimes we have no choice because there is too many limitation if we use the exchange without data verification. So, even if it is dangerous, we must follow the KYC procedure.

In fact, a project enters the crypto market with a different token supply. So how important is more or less supply to you? What do you think if there is more supply the token price of the project may be lower. But you should know that a project becomes stronger with more supply and now there are many top altcoins that have more supply.

I think the developer of the project becomes the main factor for the success of the project. So, mostly I choose the coins/tokens because of the quality of the developers or teams. We know their quality from their track records, their plans to develop the projects, and the partnerships. The supply may have an impact but it is not very crucial as the quality of the developers or the teams. I see Dogecoin even has almost unlimited supply but it can be one of the top coins. So, the supply has no big effect here.

It's true that no one can predict the future of bitcoin accurately, so I have confidence that bitcoin will still survive for the next 5-10 years.  Bitcoin will become more expensive during the bullish season.  And crypto will become more popular and more and more people will invest there.

If there is someone who can predict accurately, all people will rely on his prediction. 
Sure, no one can predict it with exact result. Every prediction are from the technical analysis and fundamental analysis.
Although we do it deeply, there is no guarantee for the exact result. There is a chance to fail, but mostly it becomes true. Because when we analyze the potential price, we use complex research.