>>939797547 (OP)
Anons are all giving retarded answers but you have a lot of options if you live in the states. Namely:
> Buy something and flip it. Because $100 isn't very much you'd have to flip a lot
> Invest in something. Right now all major investments as of recent would only pull you up slightly (like $147 for silver, like $123 for VOO, like $150 for bitcoin if you timed hte market just right on all). You will almost certainly turn that into $1000 with any of those investments over a year.
> Use it to buy stuff that will give you a better opportunity. For only $100, you're looking at getting a nice set of clothes to interview at McDonalds. You'll have your $1000 in like 2 weeks.
$100 bucks isn't a lot, but I'm a big investment guy so I'd go with the investment route or the job route. Get the job and regularly invest as much as you can. You'll retire a millionaire even if you're making near 40k a year depedning on how much you spend