It's a good idea. Why? Because I did it in mid-September until mid-December, 2017. Convert, Hodl, and Sell it at the best time. But at the time, I am not converting all my bitcoin into ethereum, the portion I use is only 40%. And the result is very profitable because I get to profit from bitcoin and ethereum when the price of 2 coins rises up significantly.

As you said I will repeat the same way in this year with the hope I get the same profit like a years ago.