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 ?
See what i think is ,always diversify your investment. Investing all your wealth in bitcoin or any of the single altcoin ,will be very risky . As if that currency falls, then you will loose major portion of your investment and definitely you will quit. But if you are investing in 5-6 coins, then if one falls there are 5 others to compensate your loss.