Actually people's learn from mistake. Those mistake I did began, I am realizing now. That's why I want to share it. Perhaps everyone will not agree with me. Every traders have few favorite coins. It's normal fact, but don't love too much any coin it's my logic.
I don't want to mention but I have lost many btc just one coin. Just think it will go more up and didn't sold. In a result price dropped 4X. So I want to say don't love any coin, just sale when you are in profit and go another coin or wait for drop price again and buy it. It's very difficult to recover once drop an Altcoin. One more thing, don't invest your all fund on single coin. It will loss more, who know it will up or drop.
Your opinion is also very real and i think depending on the time of good or bad market we choose Altcoins which are potential. Focus on a coin is also not potential and effective.Coins that have strategies and the prospect i always take priority and hold.
We also have to look at the progress from the developers if they are active for the success of the project and are intelligent and to know that how to give the future to the project then these coins grow more higher in the future and give more profit to the investors.