Diversification is the best not only in crypto but also in life.. meanwhile such other ALTs coin you want to invest on e.g luno polka dot ada erhereum etc.It can be said that Bitcoin has the greatest attention out of all cryptocurrency.
One important question is if someone should focus on just one crypto, Bitcoin only, or to diversify and invest into other altcoins.
If so, which give altcoins would you choose after bitcoin?