It only means that you have to be very selective and fully understand who you can call a friend, and who is a person you only know well. I dont remember any case that a friend somehow set me up or brought me any financial problems. I dont have hundred or thousand friend (but Facebook or other social media tell different), maybe only a bunch, but I can really trust those people. I had not a single example when they made me doubt them.
I do have friends which I think I can trust because I know them personally, they willing to help me and they never do bad to me. But, I have never live with them, we never create a business together and we never loan/lend to each other.
Not sure how close you with your friends, but I don't want to take risk for doing that.
I usually heard people said like this "don't mix friends for happiness and friends for business".
Even relatives, people who share the same blood or grow up with us can betray us, friends are nothing and not worth trusting. If we cannot trust our mother, wife or children then no one else in this world is trustworthy.
Remember, they are human and have greed too, they have never betrayed you before but that does not guarantee that they will not betray you in the future.
Exactly, we were good with our friends a year ago, we know they never commit corrupt.
But, humans are dynamic and they keep changing, a year ago they said friendship is number one, this year they might say money is the number one.