There is no set rules or guidelines for percentage of coins in portfolio. For myself, I prefer to have at least 40 to 50% in BTC.
And coins percentage most likely change depending on the current market situation.
No there is no specific amount or percentage of holding coins. I believe that every trader has their own strategy or ways on which they think they will benefit more. The percentage or the amount will definitely depend on the owner. As a newbie trader, I often more than half of possible profit due to bad decision making. Sometimes, the price of the tokens will suddenly go down and it was also the time when I needed some money so what would happen is that I will be forced to trade at low prices because I need to.
Those who are going to follow your advice are definitely going to be the new elite class of the crypto world. There is no doubt in this fact that bitcoin is the most successful digital currency up till now and the new rich people we are seeing because of digital currencies are all those who invested and kept bitcoin in their wallet for long time with patience.