13.3BTC will last maybe 4 months, if you don't spend to much.

If you're like me it'll last 3 months haha.

Have fun with it imo, Spend it doing things you wouldn't spend money on if you didn't get it for free. Know what i'm saying?

There might be a bunch of fellas' that come and insult this way of thinking, but if you're young, use that money to go have fun.

If it was like 10,000$ or more i'd suggest investment's, but for an amount of only ~5,000$ Spend it having fun bud!