Bitcoin seems to be the past and Ethereum the future.
The question is : when BTC will worth almost zero? Next year? In 2 years?

During this time, nothing has changed, well, except the price. Bitcoin is also the number one and all coins depend on it, and Ethereum is somewhere near it and remains forever promising
Isn't it funny to see on how OP expected that bitcoin will go to zero by last year?
While the other side has happened and it is still the number one coin that dominates and predicts the market for the rest of altcoins.