Currently the most I hold is Bitcoin and a little OMG and ETH but trader wise, is there a recommended percentage?
My current holdings are:
BTC 60.75%
OMG 33.74%
ETH 5.51%
Everything depends on the stability of the coin, since bitcoin is now very stable, even with the risks it should have the highest percentage. For other coins, you should look in what position they are in the current time, rise or fall. And already from this to make their own assumptions. As for me, you have wasted ETH so much and put a lot of OMG, well, it's your scheme.