Bitcoin, always. XRP (Ripple is the enterprise behind the coin, and the name of the coin is XRP instead of Ripple) is not even considered the "same" as other crypto, for it is leaded by a private company and is centralized. Now, even when XRP can have profits itself, I believe for long term is much better bitcoin. My thoughts are based not only in the love we all have for the first crypto, the king, and the responsible  for all this "crypto fever", but also because when you take a look to the news (over all them talking about governments regulations), you will always read the word "Bitcoin". So, Bitcoin is on the talking of the governments all over the planet. That's mean: it is going to become an important part of the global economy pretty soon.
Big companies are talking about accept BTC as a paydment system, and, at the same time, the production of them is becoming lower and lower. So, there is going to be a time where (probably) will be a part of the economy, will be used by many and will be more and more desired for many, while there are going to be the same of them on the global market.
So, to me, BTC is one (if not the best) investment for long term.