Source of Wealth declaration form

So i received a email from binance today asking me to fill a form about my source of wealth

I have my binance account since 2018 and done the KYC a lot of time ago and never had any problems.

They are asking about some BTC deposit that happend in 2021, wich is from my hardware wallet, and they want to know where my crypto comes from and how i bought it.

Plus i need to fill a form about where my money comes from and how much i make a year.

Is this normal? why right now?

Should i just withdraw all my crypto from binance and forget about this email?