Whales are quietly buying this L2. While you were watching memecoins rug, smart money was loading up on ARB — and on-chain data proves it. Here's exactly how to spot it yourself. Step one: Open Nansen or Arkham. Filter wallets holding over 500K in assets. These are your smart money wallets. Step two: Sort by 7-day accumulation. Right now, a cluster of these wallets is silently stacking Arbitrum's …