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Wish I could have the $BTC, but that is where my money is stuck for now and I might as well get some correlation with crypto if possible.

Also have some of the $ETH ETF as well. In fact, that is one of sevral "retirement accounts that I have and I converted the whole thing to crypto related plays. My other ones are in more traditional investments.

Changing jobs over the years has left with multiple small retirement accounts (I guess I am unintentionally diversified)!

Diversification is applaudable. But looking at the success of Bitcoin, I now think that those were better who proclaimed to be Bitcoin maximalists. They have put all in one basket and now enjoying the luxurious retirement, already.

What do you think?

I mostly lean toward the all your eggs in one basket approach.

It's a fair approach. Mastering something is always preferable than being a jack of all trades, in my humble opinion.