I prediction still BTC on the top because BTC is a main coin, all coins finaly converted to BTC include ETH but for quantity a transaction of course i agree with you. ETH is most solid the transcation at this time because all alt coin convert to ETH before to converting to BTC
Of course BTC will always be the leader because BTC is the king of all Cryptocurrency and can be considered as the best investment. I think this market will always be of interest to investors because of the good liquidity and the foundation of Blockchain will be applied in many different areas, this will help Cryptocurrency become a new revolution in the industry modern industry