The leading smart-contract blockchain Ethereum’s supposedly bullish “Merge” – a key milestone in its historic shift to a more environmentally friendly system – will likely happen in September.Already, crypto traders are mapping out how they’re going to play it from an investment perspective. And blockchain protocols are racing to set up venues for lending and trading the event, and for financing speculative positions.In one popular angle, traders buy or hold ether (ETH) in the spot or derivatives market, while buying Lido’s staked ether tokens – stETH – to profit from the event.