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?
For the moment I have not thought of it that way. Bitcoin will still be king in my opinion, because it is very strong with the community. Ethereum has an opportunity to be parallel to bitcoin, but it also takes a long time. A good project might shift the bitcoin from its position, but until now no project has exceeded the bitcoin.