Never ask permission or validation from strangers to dream a dream. That kind of self doubt will hold you back.

Just remember that the top rankings is your long term goal and you'll have plenty of little things to focus on in between now and then.

There's no way anyone can say how much you will or won't amount to - just give it a go.

Remember people are often limited by what they feel and really believe is possible for themselves. If you ask this kind of question you will really get an answer that is truer for them than for you.