Monero is an altcoin, meaning it’s a cryptocurrency other than Bitcoin. These are generally considered speculative investments that some traders make quick profits from, while others get “rekt” (crypto slang for losing a lot of money).
If an investor manages to buy XMR at a low price and then turn around and sell it at a higher price, then this could be considered a good bet. Doing so would be the only way to make money since Monero doesn’t pay a dividend or yield any interest.