Newbies has no much knowledge about how things works and hence should stay away from any sort of trading, or before investing or trading any crypto, you most have enough information concerning them.
You have a point, but there are certain safe platforms out there that apart from educating newcomers on this particular field, also gives them some play/fake money to practice trading based on the actual market behavior
[I do know some might argue that it's not going to be the same when they use their own money and I agree, but it's still better than nothing].