No it won't make you a millionaire with todays value with just couple thousand dollars (assuming 1k to 10k) investment. the market cap for Ripple was just 200 million dollars in Jan 2017. IN the current Ripple market cap of 20 billion dollars, it could only make you millionaire with a couple of thousand dollars if ripple market cap reaches 2 to 20 trillion. Just do the math. Don't think you half dollar ripple could become the same price of bitcoin (they have a different total supply) unless it's super hype bubble.