But it is better to hodl Bitcoin and not trade it especially if you don't have much skill in trading. You will meet many bad situation in the market where you can panic and lose control. Using Bitcoin to trade is an option and not many people can do while they prefer to choose Bitcoin as their investment.
But no safest option to choose if that is trading because the crypto market will be unstable. You need to be careful when using Bitcoin for trading. Worth it or not will depend on your skill in trading.
You have a point there but the main topic is about if it's worth trading only bitcoin that's why I said that it's better to trade only bitcoin if you as a trader for example isn't sure about other crypto then yes it is the best option to choose only bitcoin. One more thing, it is not about if you have the skills or not. For situations like that where you don't have much skills in trading then I would also say it's better to hold bitcoin than to trade but you won't be able to become a better trader if you don't face it. When you make a mistake in trading is what makes you learn from it.