I hate to be the bearer of a bad news, but I must be honest with you, the stage at which bitcoin made turned $100 investors into millionaires is gone, at the current stage bitcoin is right now, you get what you put in, this is, if you invest means, then possibly, you gonna make millions back in profit, there is a high chance your profit is gonna be in the hundreds, while if you invest thousands, your profit will likely be in thousands.
So the above is my way of saying, don't invest a $100 in bitcoin and expect to bitcoin a millionaire, this will likely not happen even if the price of bitcoin skyrockets to $1 million dollar..
So watch it.