Earlier quoted context omitted.
"Be fearful when others are greedy". Greed is at an all-time high, so be careful. Whether that means buying or selling or staying put is for you to decide.
Any advice that confidently ends with "but whether you do A, B, or C, is for you to decide" can generally be safely avoided. This is providing 0 bits of guidance.
The only valid advice here is to be careful because the economic climate is unstable, and it's not the time to make rash decisions.