Can I enter Binance generated BTC Address for deposit into Slushpool Payouts Wallet for long term use ?
Is this address fixed or changes from time to time and if it changes will the old address still be valid and I'll receive the money?
Or it's better to use other account like coinbase and than transfer to binnance. I just want to save on transfer time and fees (Network Transaction Fees).
For long term use it will definitely be not safe if you are using any kind of online wallets like coinbase or binance. To totally have the responsibility over your btc you can purchase hardware wallets like ledger. Or for long term choose a wallet that supports segwit which helps making the transactions fast and with comparably low fee like the latest version of electrum.