Potentially. The did say they don't intend it to be permenant. Til then though you may want to register at a smaller instance that is federated with both us and them.
It's what I did. I like the atmosphere of beehaw but I wanted to be able to use all of those communities outside them, so I came to lemm.ee instead. Also made a kbin account because I hope their thing takes off, their model is potentially better than Lemmy while still being able to interact with Lemmy.