It's good to see Ethereum climbing like this. It all points to the direction that altseason is soon starting.
Now "why is Ethereum climbing when it's so expensive to use?" - it's expensive to use thanks to the fact that a lot of people are interested. Just the normal way of things happening.
A lots of expectation coming from the investors side, the very reason why the price is climbing up. With more trust from traders and holders
the value will continue to pump high, after breaking the last time high for sure investors will aim for more, while holding and newcomers also
start to invest, the potential is more bigger than the last time high.