I would  say it's better to keep 50% in BTC and 50% in Altcoins

I'm sure that in 2-5 years  there will be a leader in each segment of the crypto market
In blockchains is - #Verge
in games - #MobileGO
in cloud storage - #STORJ
in transactions Digibyte, LTC or Dash

I will keep them as 50% of my portfolio