For the second statement, it is good advice not to put all our money into Bitcoin. What would we call people who go against this rule? Gamblers? High-risk takers, or just plain stupid. I'll bet on Bitcoin. Would you?
Putting all your money in Bitcoin is definitely not a good idea, even when investing it's usually advised you don't make all your investment in one place but have some to keep to yourself, it's literally common sense that you don't put all your funds in one place just should Incase uncertainties happens you don't have to loose every of your hard earned money.