Nice tips you got there but I think your tips are lacking something. One of the most common mistake a newbie does is to invest in only one coin which in the end leads to loss if that certain coin does not perform well. That being said, you should have had included there this: "diversify your investments. Never invest in one coin only and always remember to not put all your eggs in one basket".
I agree that investing in only one coin is bad and it should be added to the tips. Because investing only on one coin is also considered as gambling your money. Gambling in a sense of you are putting your money in a 50-50 situation. So, i suggest that every beginner in cryptoworld should know the importance of not depending on only one coin.