Comparing investments to gambling doesn't make any sense. I don't consider spending hours reading into a project and putting a value on the product anything close to gambling. Also, the total market cap wasn't 10 billion dollars three months ago, that's just not true (it was 25 bil Apr 01 according to coinmarketcap.) Don't spend what you can't lose of course, but also don't misguide people to scare them with fake numbers
RE: what does "don't invest what you can't afford to totally lose" mean?