Is it a good idea to buy some crypto for long time investment plan from exchanges such as binance as keep it there, any alternatives ? Because i have heard bad things about some famous exchanges such coinbase.
Dont make these exchange platforms to be your main wallet specially if you do store up your coins. Always remember "Not your keys, not your coins".
When these platforms or exchange would be hacked then theres no chance for you to recover those funds you have stored into that place.
Make use of this when you are just trading off or buying coins in that place and then pull it out if you are already done with your transaction.
Store your coins in non-custodial wallets like Electrum for Bitcoin or Myetherwallet for erc20 etc.