If you are an experienced trader and have long been familiar with the cryptocurrency market it is better to trade, but if you are a beginner it is better to buy and wait.
This is a very good advice, however, to become an experienced trader you should start with something first. I would better recommend start trading.
If you dont have any other earnings then trading is the right way but if you had an job and earning way then holding for a long period will help your future to live peacefully.