I watch them on Blockfolio and after they reach a certain amount (it depends on the coin) I will sell most of them. It't actually a little work to sell them and I'm pretty lazy most of the time, so I just hold most of them. But I can't recommend Blockfolio enough. It's super nice for unlocking your phone every other minute and seeing if something is moving... lol Honestly though it's an easy way to keep an eye on your coins.
Yeah, I love this apps too. But sometimes, blockfolio apps often have errors while showing the price. We need to refresh the apps each time to get correct price. Some New ERC20 token, often takes time to show up their ticker on that apps.