Usually they recommend you to diversify your investment, so you avoid losses.
But as a real approach, having $1.5k, would you invest in how many cryptocurrencies ?
What if I invest little by little, only in Bitcoin, would that work as well ?
Yes, diversification of investment is good. This way if one fails you still have others left. You can experiment, that is if you are open minded and is willing to risk. Anyway there is no investment that is not risky, only in intensity differs. Better invest in crypto and also in physical or material investment.