you have your point, but you can earn from the appreciation of the currency, which does not occur in the CDB and to earn you need the money to be idle for 30 days.

The truth is that you need to have a lot of BNB. to earn almost nothing from Air Drop. just do the math. I have 500 reais and earned 2 reais. if I left it in a CDB, I would earn 5.