So many if you invest your money in 15 altcoins and it seems that your choice of coins is good because there are also many people who hold coins.
I only invested in 3 coins and that also took up a lot of my time, especially if I hold a lot of coins, I can't monitor them
To easily manage your investment you can download blockfolio apps in google store ( i don't know it also available in appstore or not )
There you can put what coins do you have and which exchange that you want to monitor, it's easy to take decision with your investment even you're holding more than 10 coins at the same time
Of course, it is very easy and affordable to monitor the status of your assets using block applications that can give signals and inform the owner about changes in market conditions. But it seems to me that today, every investor who invested in most altcoin can only get results with long-term storage, and given the current trend in the cryptocurrency market, it is therefore practically unnecessary to monitor your assets in the near future.
I have more then 15 alt-coins, and I don`t monitor them, at least not everyday. In past two years we have been in bearish
market, prices are dropping more then they go up. I decided to not monitor them, I will continue to believe in them, accumulate
more of them, and to hope that one day prices will be much higher. Everyday monitoring is stressful for us long-term holders, that`s
why I don`t practice that.