What if you invest in yourself ? Or a business you know ? Bitcoin investments dont really exist because bitcoin is so volatile I guess.
You can count altcoins as investments too. Gambling is much better then HYIP though.
I think here is the investment made on a monetary source, I can not make a connection between investment and betting. I want to add something, is not every gambling actually an investment? As a result, we are putting money into the option we feel.