What is the ideal amount of coins to hold in a portfolio? Forget about the actual size of investment, how thin should I be spreading it across different coins? Currently I have more than 20 coins, but I would like to get it down to 15 max, and even this is probably too many to get any real benefit if one of them decides to go on a huge bull run. I think holding between 10-12 maximum, that represents 70-80% of a portfolio (not including ETH/BTC) is about right, with a bit of extra fiat (or ETH/BTC) to do some swing trading here and there.