Yeah that's right, altcoins is suitable for day trading because it can earn profit quickly and you don't need to wait for a long time. But i'm still choose to hold my coin specially bitcoin. Yes, you can earn profit quickly in day trading but not a high profit in holding you can earn a lot more profit.
One of these coins is ethereum I strongly believed that this coin is great and have a future like bitcoin. Aside from the bitcoin that the top of my priority I also hold for long-term ethereum. Not all coins are good for day trading, I must prefer in holding a long time in my portfolio.