Stock market. You can get high returns, but assuming risks. Never invest with borrowed money. To get strong results, follow Twitter accounts of investment research firms, analysts: TheStreet, T Rowe Price, ValkCorp, Morgan Stanley, AllianceBernstein, Bankinter, etc.

I wouldnt invest with borrowed money at the current valuation of the market. Go to school, get a job, invest and live below your means

Best of luck

Try some of the ebola fighting stocks? TKMR, NLNK, BCRX, SRPT, others?