He speaks about doing own due diligences is important! That's a very basic truth of investment. Brokers and financial advisors can make your life hell with phone calls and advising stocks and bonds that's gonna fetch you unrealistic returns. But if you do your own due diligences before you leap in, a lot more information will be revealed to you so that you can take informed decision!

It's all same for real world stock market as well as crypto market. Using your own brain has no alternative!