Many are included in shitcoin, but for me this is no problem,~~
Sure, no problem as long as you don't pick them up for your asset. 
Yes, I see there are unpopular coins above but will we say those shit-coins? Moreover, you stated "many". Can you mention which coins above you categorized as shit-coins? ~~I focus on ETH who is trying a new formula and fortune this year,~~
Are you sure to focus on ETH only? How about Bitcoin? Bitcoin seems to have a great year both in 2020 and 2021. It makes sense as it will have a halving day. I see people very enthusiastic about preparing for this moment. And even, they prefer to focus on Bitcoin only. So, it is surprising to know that you disregard Bitcoin. >I think it is better to diversify your assets. Investing in a single coin only probably more risks and lessen the chance for higher profits.