i have some crypto on poloniex
You don't have any crypto, Poloniex exchange have it 
I am not sure what fees they are charging but it's surely not 240$ for bitcoin.
i am looking to send 5$ through crypto, is this normal these days?
It is more than normal if you are using non-custodial wallets, and when you don't have to depend on centralized exchanges to allow or not allow withdrawal.