In BSG Staking, Is it required to turn on computer 24/7 hours to get Staking Reward?

No it is not necessary to turn on your system 24/7. The BSG staking reward cycle is 24 hours, so you can open wallet after 24 hours of last received reward block.

Although Bsgcoin has automatic wallet backup feature, remember to take backup of your wallet file to restore Bsgcoin if your system crashes. Know more about to take backup and restore of wallet.dat file.