Since some more banks are going to invest in that coin i would suggest ripple. They will pump a lot of money into this so they will try to keep the course high.

Another one that I'd suggest is Ethereum. Im pretty sure that this one is the future and that Ethereum is going to overcome Bitcoin some day.

I suggest not to gamble with a huge amount in investment. Take two or three coins and some money that is left over at the end of the month and continuously put it into these currencies.

Take one where it is relatively safe to invest. Like Ethereum or Bitcoin.
One which is not risky like Ripple where you know that there are big players who want to keep this one up.
And one with with a higher risk where you invest a low amount of money, which has a high potential of growth. eg: you buy X-Coin for 0.02$ each for 50$ - If it reaches a course of 2 Euro you made 5000$ :)

For the last one you could invest into an ICO. Check ico-list.com for some upcoming, ongoing and finished ICO's.

Also maybe these Apps could help you :)
https://steemit.com/deutsch/@besteulz/crypto-3-blockfolio-and-icolert-two-helpfull-apps-ger-and-eng

Greetings and good Vibes
Malick