In only my personal opinion (and I am not a financial planner, so do your homework in learning about these):
- 50% Bitcoin (BTC)
- 25% Ethereum (ETH)
- 5% Litecoin (LTC)
- 5% EOS (EOS)
- 5% ZCash (ZEC)
- 5% Bytecoin (BCN)
- 2% Veritaseum (VERI)
- 1% Monero (XMR)
- 1% Fantomcoin (FCN)
- 1% Byteball (GBYTE)
Keep in mind that as new ICO (Initial Coin Offerings) are made, they are most likely going to be based off of ETH for purchases. Therefore, your portfolio is not "static" but dynamic. As all coins other than Bitcoin go up and down, you can use Bitcoin itself as a "reserve fund" to put excess profits into and out of. If you think Bitcoin is about to fall more than 10%, you can purchase more of another altcoin, such as ETH or VERI, whichever you think will fall the least compared to the coin(s) you are selling before they fall. Thus your portfolio should grow over time.
Many cryptocurrencies are not "coins" to spend, but rather new types of software, such as ETH and VERI. So, once again, do your research. Just because an altcoin is going up does not mean you can "spend" it, when the coin is made instead to be the foundation of a new company, for instance.
RE: 1500 dollars to invest, what should I do?