I think the best way to make money is day trading. There's no way a beginner can make big profits out of it tho, so you got to start with pen & paper trading in the beginning. After you start feeling comfortable with the trading, and make profit regularly, you can start trading on a platform with small amounts. Always try to trade the more trustworthy currencies, avoiding scams and coins with no future. Slowly and carefully you can start trading with bigger money, making more profit...
Or you can just hodl. Something like xmr, eth, or bch