I think an investment portfolio should be balanced and diversify among coins. Altcoins has dipped a lot in price during the past year, is this a good time to convert all to Bitcoin? Well, I hope you made the right decision.
and i think if the OP hold a good altcoins such as ethereum, eos or others,,
its better to convert a half not all,, because all great altcoins project always have a great future
always do your own research before decided anything in crypto investments