So what would be the right strategy of Diversifying Crypto Portfolio...
Have plan and make an analysis for the best coins that you want to include in your portfolio. Some coins are moving differently and its normal, you dont have to worry about it as long as the coins that you chose to hold are well-established and unlikely to be delisted in exchanges. Invest a high portion to a coin that most investors trusted the most (BTC), then choose some alts that has high potential. For me, the purpose of diversifying is I have many coins to rely on that can give me profit, less risky and reliable.
Although we can't assure that everything will be fine and earn huge profit but choosing those potential coins will save you from losing.
I invested those coins that belong to the top 20 coins in the market and I believe in them that I can get something in a month or years from now.
Diversifying our portfolio is always the best practice ever. Why not if we know that these aren't profiting anymore? As we look for a better gaining opportunity in the other coins, we need not sacrifice ourselves and hold those coins who are not anymore but instead, we let them go and replace them with a new one.