You should usually keep it off exchange wallets since they may get hacked and lose your money. If you don't own the private keys to your coins, they're essentially not yours.
You definitely should use other wallets for your BTC/alt coins. Consider even buying a hardware wallet such as a Trezor or Ledger Nano seeing as you have 4-5K of crypto.
No one can stay in the position of hackers, even hackers attacking even the police department or the defense department, and I've had pirates attacking the police station and taking over. valuable information, the news has been broadcast to the social network is also very much, now hackers have a lot and very active, so we need to be careful