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 ?
I will use $1500 in 3 different coin. Investing on bitcoin is first choice because its more safe to keep bitcoin but others coin have potential profitable. We should make research first before making investment in altcoin and i think many good altcoin with good product