You have to invest money in crypto to get the return you want. And honestly, 100$ is not that big one to start with. I understand you want to increase it following the right method. I advise you to trade with an experienced team. Get involved in the upcoming Ferox/FRX hedge funding project and ask your questions in their community. This might help you.

Trading alone (with no clue) is risky. So, another option is holding the right token/coin which is not predictable but could be worthwhile.

In crypto, there is a High Risk/Reward potential and holding the right project is profitable. Vra or Verasity is solid for the long run.