Whales are loading an L2. Right now. While retail is chasing memecoins, on-chain data is flashing a major signal. Large wallets — 7 and 8-figure positions — have been quietly stacking a specific Layer 2 token for 72 hours straight. Exchange outflows are spiking. Supply on exchanges just hit a 6-month low. That is textbook smart money accumulation. The token is Arbitrum. ARB. Wallets holding over 5…