go back to the year of 2009 and buy 10000bitcoins for
25cents each

i think it is not perfect plan because it is not possible to go in past.
sounds like a plan.. lol. a very realistic one too *sarcasm*.
but all honesty, I still think bitcoin is still in the infant stages, so most of us will reap its benefits sooner or later despite having only a few coins
There's no sure way to get rich but if you enjoy whatever you job or business you do,you would make success.