<prompt> Human: Hello personalfinance,I am a college student who will be working at an Engineering company this summer making 500 per week before taxes for 8-10 weeks. My girlfriend is studying abroad in Europe next January, and I would like to visit her for around a week. My question is:How should I invest my earnings so that I can get a decent return as well as have the money liquid enough to take out for the trip?All help is appreciated!  <response>: Youre not going to earn enough from an investment to really be noticeable. Youre better off saving as much as you can and searching for a killer airline deal. 