Well i voted for 100-500 its enough for me to be a billionaire and Yes! if i earn up much bitcoin as a usually do and store it in my wallet until my five years so that i would be a millionaire if bitcoin will become more and more exceeds up storing bitcoin is the best to make you a billionaire but don't ever forget you must work hard to achieve that for example double time earning bitcoin have a profitable income like i post in this forum and do trading and gambling i really want to be a millionaire