Split them among top 10 crypto currencies on coinmarketcap. This is the best way of how to protect yourself from losing the whole portfolio. The more quality coins, the better will your portfolio look even at the falling market.
Diversifying the portfolio will minimize risks but possible rewards will be also minimum in this case. Better to make a small portfolio with top 100 coin with marketcap and holding till bull market. Investing to good projects also help to grow balance after end of current blood bath.