Another thing is to learn to diversify our investment. Diversification is very important but a lot of people never knows that. Like you said: Warren Buffet has the success rate of 6 or 7 out of 10, showing that he doesn’t just invest his money in one, but different assets. Imagine he invested only in one, and that one investment happens to be the one that is not successful, what will he do?
Another very important thing that we need to learn is how to know the right projects to invest in. You have to be able to tell the good ones that are more likely to succeed in the market, if not, it’s going to be a waste of time diversifying. I have seen people who invested in different assets and at the end of the day 90% of their portfolio was a loss.
The real difference maker is to hold an asset that pays AND gets more valuable. For example if I buy bitcoin directly, that can go up in value but it will not pay me, if I put my money in savings account at my bank, that will pay me but not go up in value. I could go with something like UNI or Cake or even ETH gets some proof of stake pools these days, and I could make money with it, but are we 100% sure about those? For example, buying a house and then renting it could be considered a "good" investment.
This is why many people love real estate investments, you get paid for something you own, but it also goes up in value as well. If we are certain that we want to take out a loan, we need to make sure that we have something that will go up in value, but also will pay at least as much as our loan payments each month. If you can pay the loan back with it, then the thing will come for free basically.