You made other good point that I really like and I want to commend you for your effort however I want to ask what is the reason for this two advice, if you have your Bitcoin in a good and safe wallet exchange why then do you need to divide it to different wallet, this can even lead to you being confused and then losing your Bitcoin but if your Bitcoin is in one place you won't be confused when accumulating more and more Bitcoin, I don't support an investor who is accumulating Bitcoin to divide his Bitcoin in different wallet.

I still don't understand the reason for the second advise, if I'm trading with just one exchange and is not giving me issues and I'm very comfortable with it why will I now be trading with 3 to 4 exchange for what reason exactly, I think this will confuse you if you are using different exchange and it may make you forget your password, I have a friend that forgot the password of one of his exchange because he had like 4 exchange he trade his crypto coin with.