I fix computers. And whenever I get a PC in, I always check it for a bitcoin wallet. I know where the BTC files are stored in Windows. If I ever find one, and it is not password protected, I will STEAL the bitcoins and play dumb afterwards. They will be transferred to my wallet, to an exchange, and sold for cash before the computer is even delivered. Let them bitch all they want.
But this plan is extremely unlikely to work, as few people who are knowledgeable enough to have bitcoins will need me to fix their PC.
That's wild. Sincerely hope you get caught doing that.
As for the $500, you can consider some day trading. Watch the pattern of the price throughout the day, and try using a small amount to practice some short term trading. Prices fluctuate a lot in a single day, which gives you the opportunity to take advantage of that, but also comes with its risks.
I wouldn't worry about it, it's not going to happen. It's very unlikely at best. It'd be like finding a winning lottery ticket on the sidewalk. But if the day ever comes when I am copying the user files to save them, and I look in the AppData folders and see a BITCOIN folder there..... Game on. I'll take my chances.
I don't come here much anymore, I don't care about the red ratings.