XRP is a centralized currency and it is not welcomed by investors, do not believe the words about banks accepting XRP.
I think that cheap is not the proper word of factor to look at when investing in cryptocurrency. First, you dont have to buy a whole coin a token. For example if you buy an altcoin for $5k that cost $5k and get a 10% profit, and if you buy for $5k an altcoin that cost 1 cent and get same 10% profit, the profit you get will be identical. Second - take Bitcoin for example, its price is way greater than Litecoin, yet people still get profit from it.
If I were to choose between Litecoin or Ripple, I would buy Litecoin. Even though I dont follow that altcoin much (lets say Litecoin has a neutral reputation for me), but I notice only negative in connection with Ripple.