Now the mainstream currency, BTC-ETH, has the upper hand, and they have the strength and technology, but the future is likely to be a new project to replace them more mature and more comprehensive. What do you think it would be?
It's ridiculous to think who will be the new king, given that now only Bitcoin is growing, and everything is falling against it. It will continue to be on the first place, until the market becomes sufficiently liquid to be able to refuse this dependence. The lower the market capitalization falls, the higher the bitcoin domination becomes. When the market will be trillions of dollars, maybe something else will be the top 1 coin.