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 ?
With 1.5 I would invest in 3 or 4 cryptos.
I would spend less than 200 bucks for an investment.
Invest little by little would work as well. In fact its a common method that all big investors using, they invest every now and then, little by little.