XRP is a great coin for the future, I suggest you should hold them for good long period of time for your future.
Some opposite speakers says that Ripple is a good token to manipulate it's market price.
Founders hold so many tokens and could make a "big sale" on the market than price will be falls down immidiately.
Why would they do that? Usually founders of projects are not benefitting from pump and dump of their own coins so it's not likely that tihs will happen in such a big project. It's more likely that they slow sell to get their money and buy when it's low because they believe in it.
To the OP: I would suggest other projects for quick gains or bigger risk/reward-ratio. If you are not going to daytrade and want little risk but definitely reward in the long run - just don't look back on your investment in XRP for the next 6 to 12 months and keep it hodling.