As analysts raised the possibility of a spot Ethereum (CRYPTO: ETH) ETF approval, big whales ramped up their bullish bets on the world’s second-largest cryptocurrency. What Happened: James Fickel, one of the wealthiest cryptocurrency investors, swapped 350 Wrapped Bitcoin (CRYPTO: WBTC) for 6,905 Ether earlier in the day, according to on-chain tracking platform Lookonchain. The newly acquired supply was worth more than $25 million at prevailing prices. Fickel has been longing ETH/BTC pair since the launch of Bitcoin (CRYPTO: BTC) spot ETFs in January. The founder of Amaranth Foundation has exc…