What's a common piece of financial advice that you disagree with?

I think it depends on age, timing and many factors

Borrow then pay later. Though it will help those who are poor and need money to live. Those who can afford to lend them or even give them money that they can work, it will help both parties.

Buying stablecoins for savings allows you to earn interest, which is much higher than bank fixed deposits.

Is not to pay off loans including home loan when you the money.