Trading completely depends on your own skill. The more skill you have, the more likely you are to profit from trading. Most of us traders take trades based only on a guideline rather than using our skills. The guideline is that the price of a coin has gone up a lot and has gone from a lot up to a lot down. But the trading system does not follow this principle at all. A person has to acquire adequate knowledge about trading only then that person becomes fully skilled about trading.
The only skill one needs is buying low and selling high. Keep patience through through the price changes and you will do well in the long run. Trading is a long term game not a one day affair hence patience becomes very important.
This becomes complicated if you are going with altcoins trading and not keeping yourself limited in the number of assets. The altcoins carry higher risk and the risk appetite of every person varies. Traders learn this over time and it's vital to recognise - most traders can handle the stress only if they are doing this well.