what is effect of hard fork on monero ?
Hopefully a price increase of XMR towards the fork/snapshot.
Other than that XMR is not affected by this hardfork, as XMV has a blockchain that is incompatible with the XMR chain from the snapshot block on.
Monero chats is full of saying this is another scam like monero gold but i can see its an actual fork and not erc20.
Exactly. This is a fork of the actual blockchain and not just some tokens that are labeled Monero something. At the very least you'll get free coins based on your XMR balance and loaded up on XMR, which is never a bad idea.