1. The number of positions is fine, professional hedge fund managers often have 30 to 50 stocks in their portfolios

2. BTC should be in the portfolio, perhaps a 25% to 40% weight. This will give you diversification when all the alts are falling

3. Long term positions in this portfolio include Ether, Stratis, Lisk, NEM, Dash, Factom

4. I would consider adding more privacy exposure such as Monero, Zencash, Deep Onion, or Spectrecoin

5. Every good portfolio deserves a few shoot for the moon low market cap high flyers: Linda, 1337, 808, Sumokoin, InflationCoin, etc. So people have less flattering names for these coins

Do lots of research before you invest and be ready for big fluctuations, its to be expected these are not sleepy muni bond investments.