That seems unlikely to me because this means this one miner gets almost all coins mined on the network. One block per minute * 5000 coins per block = 300.000 coins per hour...
What kind of hardware does he have is this a big farm pointing on Ravencoin. Soon he will need to pay for his cost and he will need to sell his coin.
Just wanted to clear this up. This is crypto-bridge's account. They typically have lots of smaller accounts for raven that is deposited but because a lot of small miners have been mining to their crypto-bridge wallet address, crypto-bridge has had to do some "sweeping" to consolidate all those smaller amounts into larger amounts. This is their consolidation account. Nothing to be worried about guys, you can confirm it with crypto-bridge yourself on their discord channel.