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 ?
33% rule! That is the idea I found in watching online tutorials about trading. In this scenario, you can select only 3 coins for your portfolio so that, you can trade it as better as you can. But for me, it is better if we have more than 5 coins in our portfolio because we discussed here the potential of the coins to grow up. We need to have many coins as we can specially if we are a long term holder.