I'm not sure that's possible. According to crypto traders, Ripple will rise and fall, rise and fall. A little you can earn, but to become a millionaire - I don't think.
It will be impossible if you are not a part from the early holders of ripple. this coin has touched its peak price and that will never be happened again dude.
If buy that right now and is there a guarantee for your amount right now? i can't say you get nothing for that. When the price gets dumped and then that's it.