While bitcoin (BTC-USD) continues to trade in a very tight range in the low-mid $50K area - and well below a record high of nearly $65K from two weeks ago - ether (ETH-USD) continues hitting all-time highs, touching $2,775 minutes ago.It's time to begin keeping an eye on the Ether/Bitcoin ratio, which has climbed to 0.052, it's highest level since mid-2018.As to the catalyst behind ether's large move (absolute, and relative to bitcoin), some suggest bitcoin - now with sizable institutional adoption and clearly in the sights of regulatory bodies - has become the mature, establishment cryptocurrency. Investors looking for more exciting returns have turned their eye to ether, whether directly or via DeFi (decentralized finance).Vishesh Raisinghani explores whether Ethereum could overtake Bitcoin in market cap.