Managing cost basis on a transfer

I’m keeping my self custody Bitcoin where it is right now. So I’m not entirely moving to the dark side lol

I do have a fair bit sitting in centralized exchanges anyway, and wanted to take advantage of the robinhood 2% offer.

I’m planning on never selling anyway, but how should I handle tax basis? I’m mainly moving from coinbase. Any tips? I have heard a rumor of someone getting a taxable event doing this

My biggest reluctance is coinbase does a decent job on the tax part. I don’t really want to move the funds around but 2% is a lot.

I guess the other bit to consider is transfer costs and staking.