and maybe Bitcoin.
I'd like to hear from you what do you think about this?
Are you sure that you are only taking bitcoin as a "maybe" to hold coin? What I think about it is you are introduced to cryptocurrency through altcoins and so you are talking bitcoin lightly base on your reaction.
Good whether coin I chose?
Your choices are good.
What are your choice of coins to invest in?
Bitcoin and ETH are the main dish of my portfolio.
I think that it is necessary to take into account at least 5 coins
5 coins shall be enough for diversification.