Inexperienced users are more likely to make mistakes, and it doesn't matter whether they are young or old.
Indeed, newbies are often the one who likely to commit mistakes because they are lacking of knowledge and easy to convince for a high reward but high risk type of investment. However newbies has no age bracket so you can engage yourselves regardless on how old you are, thus it doesnt mean they're specifically young people.
What im certain is if you fill your mind with knowledge and aware of what you're getting into, its unlikely for you to fail or commit the usual mistake of newbies.